Edinburgh Castle Part I

 

Edinburgh Castle is a historic castle in Edinburgh, Scotland. It stands on Castle Rock, which has been occupied by humans since at least the Iron Age. There has been a royal castle on the rock since at least the reign of Malcolm III in the 11th century, and the castle continued to be a royal residence until 1633. From the 15th century, the castle's residential role declined, and by the 17th century it was principally used as a military garrison. Its importance as a part of Scotland's national heritage was recognised increasingly from the early 19th century onwards, and various restoration programmes have been carried out over the past century and a half.

Edinburgh Castle has played a prominent role in Scottish history, and has served variously as a royal residence, an arsenal, a treasury, a national archive, a mint, a prison, a military fortress, and the home of the Honours of Scotland – the Scottish regalia. As one of the most important strongholds in the Kingdom of Scotland, the castle was involved in many historical conflicts from the Wars of Scottish Independence in the 14th century to the Jacobite rising of 1745. Research undertaken in 2014 identified 26 sieges in its 1,100-year history, giving it a claim to having been "the most besieged place in Great Britain and one of the most attacked in the world". Few of the present buildings pre-date the Lang Siege of 1573, when the medieval defenses were largely destroyed by artillery bombardment. The most notable exceptions are St Margaret's Chapel from the early 12th century, which is regarded as the oldest building in Edinburgh, the Royal Palace, and the early 16th-century Great Hall. The castle is the site of the Scottish National War Memorial and the National War Museum. The British Army is still responsible for some parts of the castle, although its presence is now largely ceremonial and administrative. The castle is the regimental headquarters of the Royal Regiment of Scotland and the Royal Scots Dragoon Guards and houses their regimental museums, along with that of the Royal Scots.

The castle, in the care of Historic Environment Scotland, is Scotland's most (and the United Kingdom's second most) visited paid tourist attraction, with over 2.2 million visitors in 2019 and over 70 percent of leisure visitors to Edinburgh visiting the castle. As the backdrop to the Royal Edinburgh Military Tattoo during the annual Edinburgh Festival, the castle has become a recognizable symbol of Edinburgh in particular and of Scotland as a whole.

History

Pre-history of the Castle Rock

Geology

The castle stands upon the plug of an extinct volcano, which is estimated to have risen about 350 million years ago during the Lower Carboniferous period. The Castle Rock is the remains of a volcanic pipe, which cut through the surrounding sedimentary rock before cooling to form very hard dolerite, a type of basalt. Subsequent glacial erosion was resisted by the dolerite, which protected the softer rock to the east, leaving a crag and tail formation.

The summit of the Castle Rock is 130 metres (430 ft) above sea level, with rocky cliffs to the south, west, and north, rising to a height of 80 metres (260 ft) above the surrounding landscape. This means that the only readily accessible route to the castle lies to the east, where the ridge slopes more gently. The defensive advantage of such a site is self-evident, but the geology of the rock also presents difficulties, since basalt is extremely impermeable. Providing water to the Upper Ward of the castle was problematic, and despite the sinking of a 34-metre (112 ft) deep well, the water supply often ran out during drought or siege, including during the Lang Siege in 1573.

Earliest habitation

Archaeological investigation has yet to establish when the Castle Rock was first used for human habitation. There is no record of any Roman interest in the location during General Agricola's invasion of northern Britain near the end of the 1st century AD. Ptolemy's map of the 2nd century AD shows a settlement in the territory of the Votadini named "Alauna", meaning "rock place", making this possibly the earliest known name for the Castle Rock. This could, however, refer to another of the tribe's hill forts in the area. The Orygynale Cronykil of Andrew of Wyntoun (c. 1350 – c. 1423), an early source for Scottish history, names "Ebrawce" (Ebraucus), a legendary King of the Britons, as having "byggyd [built] Edynburgh". According to the earlier chronicler, Geoffrey of Monmouth (c. 1100 – c. 1155), Ebraucus had fifty children by his twenty wives, and was the founder of "Kaerebrauc" (York), "Alclud" (Dumbarton) and the "Maidens' Castle". The 16th-century English writer John Stow (c. 1525 – 1605), credited Ebraucus with building "the Castell of Maidens called Edenbrough" in 989 BC. The name "Maidens' Castle" (Latin: Castra or Castellum Puellarum) occurs frequently up until the 16th century. It appears in charters of David I (r. 1124–1153) and his successors in the Kingdom of Scotland, although the reason for it is not known. William Camden's survey of Britain, Britannia (1607), records that "the Britans called [it] Castle Myned Agned [winged rock], the Scots, the Maidens Castle and the Virgins Castle, of certaine young maidens of the Picts roiall bloud who were kept there in old time". According to the 17th-century antiquarian Father Richard Hay, the "maidens" were a group of nuns, who were ejected from the castle and replaced by canons, considered "fitter to live among soldiers". However, this story was considered "apocryphal" by the 19th-century antiquarian Daniel Wilson and has been ignored by historians since. The name may have been derived from a "Cult of the Nine Maidens" type of legend. Arthurian legends suggest that the site once held a shrine to Morgain la Fee, one of nine sisters. Later, St Monenna, said to be one of nine companions, reputedly invested a church at Edinburgh, as well as at Dumbarton and other places. Similar names are shared by many other Iron Age hillforts and may have simply described a castle that had never been taken by force or derived from an earlier Brittonic name like mag dun.

The Castle seen from the North

An archaeological excavation in the early 1990s uncovered evidence of the site having been settled during the late Bronze Age or early Iron Age, potentially making Castle Rock the longest continuously occupied site in Scotland. However, the extent of the finds was not particularly significant and insufficient to draw any certain conclusions about the precise nature or scale of this earliest known phase of occupation.

The archaeological evidence is more reliable concerning the Iron Age. Traditionally, it had been supposed that the tribes of central Scotland had made little or no use of the Castle Rock. Excavations at nearby Dunsapie Hill, Duddingston, Inveresk and Traprain Law had revealed relatively large settlements and it was supposed that these sites had been chosen in preference to the Castle Rock. However, the excavation in the 1990s pointed to the probable existence of an enclosed hillfort on the rock, although only the fringes of the site were excavated. House fragments revealed were similar to Iron Age dwellings previously found in Northumbria.

The 1990s dig revealed clear signs of habitation from the 1st and 2nd centuries AD, consistent with Ptolemy's reference to "Alauna". Signs of occupation included some Roman material, including pottery, bronzes and brooches, implying a possible trading relationship between the Votadini and the Romans beginning with Agricola's northern campaign in AD 82, and continuing through to the establishment of the Antonine Wall around AD 140. The nature of the settlement in this period is inconclusive, but Driscoll and Yeoman suggest it may have been a broch, similar to the one at Edin's Hall near Duns in the Scottish Borders.

Early Middle Ages

The castle does not re-appear in contemporary historical records from the time of Ptolemy until around AD 600. Then, in the epic Welsh poem Y Gododdin there is a reference to Din Eidyn, "the stronghold of Eidyn". This has been generally assumed to refer to the Castle Rock. The poem tells of the Gododdin King Mynyddog Mwynfawr, and his band of warriors, who, after a year of feasting in their fortress, set out to do battle with the Angles at "Catreath" (possibly Catterick) in Yorkshire. Despite performing glorious deeds of valor and bravery, the poem relates that the Gododdin were massacred.

The Irish annals record that in 638, after the events related in Y Gododdin, "Etin" was besieged by the Angles under Oswald of Northumbria, and the Gododdin were defeated. The territory around Edinburgh then became part of the Kingdom of Northumbria, which was itself absorbed by England in the 10th century. Lothian became part of Scotland, during the reign of Indulf (r.954–962).

The archaeological evidence for the period in question is based entirely on the analysis of middens (domestic refuse heaps), with no evidence of structures. Few conclusions can therefore be derived about the status of the settlement during this period, although the midden deposits show no clear break since Roman times.

High Middle Ages

The first documentary reference to a castle at Edinburgh is John of Fordun's account of the death of King Malcolm III (1031–1093). Fordun describes his widow, the future Saint Margaret, as residing at the "Castle of Maidens" when she is brought news of his death in November 1093. Fordun's account goes on to relate how Margaret died of grief within days, and how Malcolm's brother Donald Bane laid siege to the castle. However, Fordun's chronicle was not written until the later 14th century, and the near-contemporary account of the life of St Margaret by Bishop Turgot makes no mention of a castle. During the reigns of Malcolm III and his sons, Edinburgh Castle became one of the most significant royal centres in Scotland. Malcolm's son King Edgar died here in 1107.

Malcolm's youngest son, King David I (r.1124–1153), developed Edinburgh as a seat of royal power principally through his administrative reforms (termed by some modern scholars the Davidian Revolution). Between 1139 and 1150, David held an assembly of nobles and churchmen, a precursor to the parliament of Scotland, at the castle. Any buildings or defenses would probably have been of timber, although two stone buildings are documented as having existed in the 12th century. Of these, St. Margaret's Chapel remains at the summit of the rock. The second was a church, dedicated to St. Mary, which stood on the site of the Scottish National War Memorial. Given that the southern part of the Upper Ward (where Crown Square is now sited) was not suited to be built upon until the construction of the vaults in the 15th century, it seems probable that any earlier buildings would have been located towards the northern part of the rock; that is around the area where St. Margaret's Chapel stands. This has been suggested that the chapel is the last remnant of a square, stone keep, which would have formed the bulk of the 12th-century fortification. The structure may have been similar to the keep of Carlisle Castle, which David I began after 1135.

David's successor King Malcolm IV (r.1153–1165) reportedly stayed at Edinburgh more than at any other location. But in 1174, King William "the Lion" (r.1165–1214) was captured by the English at the Battle of Alnwick. He was forced to sign the Treaty of Falaise to secure his release, in return for surrendering Edinburgh Castle, along with the castles of Berwick, Roxburgh and Stirling, to the English King, Henry II. The castle was occupied by the English for twelve years, until 1186, when it was returned to William as the dowry of his English bride, Ermengarde de Beaumont, who had been chosen for him by King Henry. By the end of the 12th century, Edinburgh Castle was established as the main repository of Scotland's official state papers.

Wars of Scottish Independence

A century later, in 1286, on the death of King Alexander III, the throne of Scotland became vacant. Edward I of England was appointed to adjudicate the competing claims for the Scottish crown, but used the opportunity to attempt to establish himself as the feudal overlord of Scotland. During the negotiations, Edward stayed briefly at Edinburgh Castle and may have received homage there from the Scottish nobles.

In March 1296, Edward I invaded Scotland, unleashing the First War of Scottish Independence. Edinburgh Castle soon came under English control, surrendering after a three-day-long bombardment. Following the siege, Edward had many Scottish legal records and royal treasures moved from the castle to England. A large garrison numbering 325 men was installed in 1300. Edward also brought to Scotland his master builders of the Welsh castles, including Thomas de Houghton and Master Walter of Hereford, both of whom travelled from Wales to Edinburgh. After the death of Edward I in 1307, however, England's control over Scotland weakened. On 14 March 1314, a surprise night attack by Thomas Randolph, 1st Earl of Moray recaptured the castle. John Barbour's narrative poem The Brus relates how a party of thirty hand-picked men was guided by one William Francis, a member of the garrison who knew of a route along the north face of the Castle Rock and a place where the wall might be scaled. Making the difficult ascent, Randolph's men scaled the wall, surprised the garrison and took control.

Robert the Bruce immediately ordered the slighting of the castle to prevent its re-occupation by the English. Four months later, his army secured victory at the Battle of Bannockburn.

After Bruce's death in 1329, Edward III of England determined to renew the attempted subjugation of Scotland and supported the claim of Edward Balliol, son of the former King John Balliol, over that of Bruce's young son David II. Edward invaded in 1333, marking the start of the Second War of Scottish Independence, and the English forces reoccupied and refortified Edinburgh Castle in 1335, holding it until 1341. This time, the Scottish assault was led by William Douglas, Lord of Liddesdale. Douglas's party disguised themselves as merchants from Leith bringing supplies to the garrison. Driving a cart into the entrance, they halted it there to prevent the gates from closing. A larger force hidden nearby rushed to join them and the castle was retaken. The 100 English men of the garrison were all killed.

David's Tower and the 15th century

The 1357 Treaty of Berwick brought the Wars of Independence to a close. David II resumed his rule and set about rebuilding Edinburgh Castle which became his principal seat of government. David's Tower was begun around 1367, and was incomplete when David died at the castle in 1371. It was completed by his successor, Robert II, in the 1370s. The tower stood on the site of the present Half Moon Battery connected by a section of curtain wall to the smaller Constable's Tower, a round tower built between 1375 and 1379 where the Portcullis Gate now stands.

In the early 15th century, another English invasion, this time under Henry IV, reached Edinburgh Castle and began a siege, but eventually withdrew due to lack of supplies. From 1437, Sir William Crichton was Keeper of Edinburgh Castle, and soon after became Chancellor of Scotland. In an attempt to gain the regency of Scotland, Crichton sought to break the power of the Douglases, the principal noble family in the kingdom. The 16-year-old William Douglas, 6th Earl of Douglas, and his younger brother David were summoned to Edinburgh Castle in November 1440. After the so-called "Black Dinner" had taken place in David's Tower, both boys were summarily executed on trumped-up charges in the presence of the 10-year-old King James II (r.1437–1460). Douglas' supporters subsequently besieged the castle, inflicting damage. Construction continued throughout this period, with the area now known as Crown Square being laid out over vaults in the 1430s. Royal apartments were built, forming the nucleus of the later palace block, and a Great Hall was in existence by 1458. In 1464, access to the castle was improved when the current approach road up the north-east side of the rock was created to allow easier movement of the royal artillery train in and out of the area now known as the Upper Ward.

In 1479, Alexander Stewart, Duke of Albany, was imprisoned in David's Tower for plotting against his brother, King James III (r.1460–1488). He escaped by getting his guards drunk, and then lowering himself from a window on a rope. The duke fled to France, then England, where he allied himself with King Edward IV. In 1482, Albany marched into Scotland with Richard, Duke of Gloucester (later King Richard III), and an English army. James III was trapped in the castle from 22 July to 29 September 1482 until he successfully negotiated a settlement.

During the 15th century, the castle was increasingly used as an arsenal and armaments factory. The first known purchase of a gun was in 1384, and the "great bombard" Mons Meg was delivered to Edinburgh in 1457. The first recorded mention of an armory for the manufacture of guns occurs in 1474, and by 1498 the master gunner Robert Borthwick was casting bronze guns at Edinburgh. By 1511 Edinburgh was the principal foundry in Scotland, supplanting Stirling Castle, with Scottish and European smiths working under Borthwick, who by 1512 was appointed "master melter of the king's guns". Their output included guns for the Scottish flagship, the "Great Michael", and the "Seven Sisters", a set of cannons captured by the English at Flodden in 1513. Sir Thomas Howard, England's Lord Admiral, admired their graceful shape and brilliant finish, declaring them the most beautiful [cannon] for their size and length that he had ever seen. From 1510 Dutch craftsmen were also producing hand culverins, an early firearm. After Flodden, Borthwick continued his work, producing an unknown number of guns, but none have survived. He was succeeded by French smiths, who began manufacturing hagbuts (another type of firearm) in the 1550s, and by 1541 the castle had a stock of 413.

Meanwhile, the royal family began to stay more frequently at the Abbey of Holyrood, about 1 mile (1.6 km) from the castle. Around the end of the fifteenth century, King James IV (r.1488–1513) built the Palace of Holyroodhouse, by the abbey, as his principal Edinburgh residence and the castle's role as a royal home subsequently declined. James IV did, however, construct the Great Hall, which was completed in the early 16th century, and the castle featured in his tournaments of the Wild Knight and the Black Lady. His daughter Margaret Stewart was lodged in the castle with her servant Ellen More.

16th century and the Lang Siege

James IV was killed in battle at Flodden Field, on 9 September 1513. Expecting the English to press their advantage, the Scots hastily constructed a town wall around Edinburgh and augmented the castle's defenses. Robert Borthwick and a Frenchman, Antoine d'Arces, were involved in designing new artillery defenses and fortifications in 1514, though it appears from lack of evidence that little of the planned work was carried out. Three years later, King James V (r.1513–1542), still only five years old, was brought to the castle for safety. Upon his death 25 years later, the crown passed to his week-old daughter, Mary, Queen of Scots. English invasions followed, as King Henry VIII attempted to force a dynastic marriage on Scotland. When the English burnt Edinburgh in May 1544 the gunner Andrew Mansioun firing from the castle destroyed an English cannon placed to bombard the forework. In 1547 disaffected members of the garrison who resented Regent Arran came to Norham Castle and offered to let the English in.

Refortification in 1548 included an earthen angle-bastion, known as the Spur, of the type known as trace italienne, one of the earliest examples in Britain. Brunstane Castle the home of the traitor Alexander Crichton was demolished to provide building materials. The Spur may have been designed by Migliorino Ubaldini, an Italian engineer from the court of Henry II of France, and was said to have the arms of France carved on it. James V's widow, Mary of Guise, acted as regent from 1554 until her death at the castle in 1560.

The following year, the Catholic Mary, Queen of Scots, returned from France to begin her reign, which was marred by crises and quarrels among the powerful Protestant Scottish nobility. In 1565, the Queen made an unpopular marriage with Henry Stuart, Lord Darnley, and the following year, in a small room of the Palace at Edinburgh Castle, she gave birth to their son James, who would later be King of both Scotland and England. Mary's reign was, however, brought to an abrupt end. Three months after the murder of Darnley at Kirk o' Field in 1567, she married James Hepburn, 4th Earl of Bothwell, one of the chief murder suspects. A large proportion of the nobility rebelled, resulting ultimately in the imprisonment and forced abdication of Mary at Lochleven Castle. She escaped and fled to England, but some of the nobility remained faithful to her cause. Edinburgh Castle was initially handed by its captain, James Balfour, to the Regent Moray, who had forced Mary's abdication and now held power in the name of the infant King James VI. Shortly after the Battle of Langside, in May 1568, Moray appointed Sir William Kirkcaldy of Grange Keeper of the Castle.

Grange was a trusted lieutenant of the Regent, but after Moray's murder in January 1570 his allegiance to the King's cause began to waver. Intermittent civil war continued between the supporters of the two monarchs, and in April 1571 Dumbarton Castle fell to "the King's men". Under the influence of William Maitland of Lethington, Mary's secretary, Grange changed sides, occupying the town and castle of Edinburgh for Queen Mary, and against the new regent, the Earl of Lennox. The stand-off which followed was not resolved until two years later, and became known as the "Lang Siege", from the Scots word for "long". Hostilities began in May, with a month-long siege of the town, and a second short siege in October. Blockades and skirmishing continued meanwhile, and Grange continued to refortify the castle. The King's party appealed to Elizabeth I of England for assistance, as they lacked the artillery and money required to reduce the castle, and feared that Grange would receive aid from France and the Duke of Alba in the Spanish Netherlands. Elizabeth sent ambassadors to negotiate, and in July 1572 a truce was agreed and the blockade lifted. The town was effectively surrendered to the King's party, with Grange confined to the castle.

The truce expired on 1 January 1573, and Grange began bombarding the town. His supplies of powder and shot, however, were running low, and despite having 40 cannons available, there were only seven gunners in the garrison. The King's forces, now with the Earl of Morton in charge as regent, were making headway with plans for a siege. Trenches were dug to surround the castle, and St Margaret's Well was poisoned. By February, all Queen Mary's other supporters had surrendered to the Regent, but Grange resolved to resist despite water shortages within the castle. The garrison continued to bombard the town, killing a number of citizens. They also made sorties to set fires, burning 100 houses in the town and then firing on anyone attempting to put out the flames.

In April, a force of around 1,000 English troops, led by Sir William Drury, arrived in Edinburgh. They were followed by 27 cannons from Berwick-upon-Tweed, including one that had been cast within Edinburgh Castle and captured by the English at Flodden. The English troops built an artillery emplacement on Castle Hill, immediately facing the east walls of the castle, and five others to the north, west and south. By 17 May these batteries were ready, and the bombardment began. Over the next 12 days, the gunners dispatched around 3,000 shots at the castle. On 22 May, the south wall of David's Tower collapsed, and the next day the Constable's Tower also fell. The debris blocked the castle entrance, as well as the Fore Well, although this had already run dry. On 26 May, the English attacked and captured the Spur, the outer fortification of the castle, which had been isolated by the collapse. The following day Grange emerged from the castle by a ladder after calling for a ceasefire to allow negotiations for a surrender to take place. When it was made clear that he would not be allowed to go free even if he ended the siege, Grange resolved to continue the resistance, but the garrison threatened to mutiny. He therefore arranged for Drury and his men to enter the castle on 28 May, preferring to surrender to the English rather than the Regent Morton. Edinburgh Castle was handed over to George Douglas of Parkhead, the Regent's brother, and the garrison was allowed to go free.[83] In contrast, Kirkcaldy of Grange, his brother James and two jewelers, James Mossman and James Cokke, who had been minting coins in Mary's name inside the castle, were hanged at the Cross in Edinburgh on 3 August.

Nova Scotia and Civil War

Much of the castle was subsequently rebuilt by Regent Morton, including the Spur, the new Half Moon Battery and the Portcullis Gate. Some of these works were supervised by William MacDowall, the master of work who fifteen years earlier had repaired David's Tower. The Half Moon Battery, while impressive in size, is considered by historians to have been an ineffective and outdated artillery fortification. This may have been due to a shortage of resources, although the battery's position obscuring the ancient David's Tower and enhancing the prominence of the palace block has been seen as a significant decision.

The battered palace block remained unused, particularly after James VI departed to become King of England in 1603. James had repairs carried out in 1584, and in 1615–1616 more extensive repairs were carried out in preparation for his return visit to Scotland. The mason William Wallace and master of works James Murray introduced an early Scottish example of the double-pile block. The principal external features were the three, three-storey oriel windows on the east façade, facing the town and emphasising that this was a palace rather than just a place of defence. During his visit in 1617, James held court in the refurbished palace block, but still preferred to sleep at Holyrood.

In 1621, King James granted Sir William Alexander the land in North America between New England and Newfoundland, as Nova Scotia ("New Scotland"). To promote the settlement and plantation of the new territory, the Baronetage of Nova Scotia was created in 1624. Under Scots law, baronets had to "take sasine" by symbolically receiving the earth and stone of the land of which they were baronet. To make this possible, since Nova Scotia was so distant, the King declared that sasine could be taken either in the new province or alternatively "at the castle of Edinburgh as the most eminent and principal place of Scotland."

James' successor, King Charles I, visited Edinburgh Castle only once, hosting a feast in the Great Hall and staying the night before his Scottish coronation in 1633. This was the last occasion that a reigning monarch resided in the castle. In 1639, in response to Charles' attempts to impose Episcopacy on the Scottish Church, civil war broke out between the King's forces and the Presbyterian Covenanters. The Covenanters, led by Alexander Leslie, captured Edinburgh Castle after a short siege, although it was restored to Charles after the Peace of Berwick in June the same year. The peace was short-lived, however, and the following year the Covenanters took the castle again, this time after a three-month siege, during which the garrison ran out of supplies. The Spur was badly damaged and was demolished in the 1640s. The Royalist commander James Graham, 1st Marquis of Montrose, was imprisoned here after his capture in 1650.

In May 1650, the Covenanters signed the Treaty of Breda, allying themselves with the exiled Charles II against the English Parliamentarians, who had executed his father the previous year. In response to the Scots proclaiming Charles King, Oliver Cromwell launched an invasion of Scotland, defeating the Covenanter army at Dunbar in September. Edinburgh Castle was taken after a three-month siege, which caused further damage. The Governor of the Castle, Colonel Walter Dundas, surrendered to Cromwell despite having enough supplies to hold out, allegedly from a desire to change sides.

Garrison fortress: Jacobites and prisoners of war

After his Restoration in 1660, Charles II opted to maintain a full-time standing army based on Cromwell's New Model Army. From this time until 1923, a garrison was continuously maintained at the castle. The medieval royal castle was transformed into a garrison fortress, but continued to see military and political action. The Marquis of Argyll was imprisoned here in 1661, when King Charles II settled old scores with his enemies following his return to the throne. Twenty years later, Argyll's son, the 9th Earl of Argyll, was also imprisoned in the castle for religious Nonconformism in the reign of King James VII. He escaped by disguising himself as his sister's footman, but was recaptured and returned to the castle after his failed rebellion to oust James from the throne in 1685.

James VII was deposed and exiled by the Glorious Revolution of 1688, which installed William of Orange as King of England. Not long after, in early 1689, the Estates of Scotland, after convening to accept William formally as their new king, demanded that Duke of Gordon, Governor of the Castle, surrender the fortress. Gordon, who had been appointed by James VII as a fellow Catholic, refused. In March 1689, the castle was blockaded by 7,000 troops against a garrison of 160 men, further weakened by religious disputes. On 18 March, Viscount Dundee, intent on raising a rebellion in the Highlands, climbed up the western side of the Castle Rock to urge Gordon to hold the castle against the new King. Gordon agreed, but during the ensuing siege he refused to fire upon the town, while the besiegers inflicted little damage on the castle. Despite Dundee's initial successes in the north, Gordon eventually surrendered on 14 June, due to dwindling supplies and having lost 70 men during the three-month siege.

Painting of the castle under a stormy sky

The castle was almost taken in the first Jacobite rising in support of James Stuart, the "Old Pretender", in 1715. On 8 September, just two days after the rising began, a party of around 100 Jacobite Highlanders, led by Lord Drummond, attempted to scale the walls with the assistance of members of the garrison. However, the rope ladder lowered by the castle sentries was too short, and the alarm was raised after a change of the watch. The Jacobites fled, while the deserters within the castle were hanged or flogged. In 1728, General Wade reported that the castle's defenses were decayed and inadequate, and a major strengthening of the fortifications was carried out throughout the 1720s and 1730s. This was the period when most of the artillery defenses and bastions on the north and west sides of the castle were built. These were designed by military engineer Captain John Romer, and built by the architect William Adam. They include the Argyle Battery, Mills Mount Battery, the Low Defenses and the Western Defenses.

The last military action at the castle took place during the second Jacobite rising of 1745. The Jacobite army, under Charles Edward Stuart ("Bonnie Prince Charlie"), captured Edinburgh without a fight in September 1745, but the castle remained in the hands of its ageing Deputy Governor, General George Preston, who refused to surrender. After their victory over the government army at Prestonpans on 21 September, the Jacobites attempted to blockade the castle. Preston's response was to bombard Jacobite positions within the town. After several buildings had been demolished and four people killed, Charles called off the blockade. The Jacobites themselves had no heavy guns with which to respond, and by November they had marched into England, leaving Edinburgh to the castle garrison.

Over the next century, the castle vaults were used to hold prisoners of war during several conflicts, including the Seven Years' War (1756–1763), the American War of Independence (1775–1783) and the Napoleonic Wars (1803–1815). During this time, several new buildings were erected within the castle, including powder magazines, stores, the Governor's House (1742), and the New Barracks (1796–1799).