Robert Stewart, Duke of Albany (c. 1340 – 3 September 1420), a member of the Scottish royal house, served as regent (at least partially) to three different Scottish monarchs (Robert II, Robert III, and James I). He also held the titles of Earl of Menteith (28 February 1361), Earl of Fife (1361; resigned in 1372), Earl of Buchan (1394; resigned in 1406) and Earl of Atholl (1403, for the duration of Robert III's life only), in addition to his 1398 creation as Duke of Albany. A ruthless politician, Albany was widely regarded as having caused the murder of his nephew, the Duke of Rothesay, and brother to the future King James I of Scotland. James was held in captivity in England for eighteen years, during which time Albany served as regent in Scotland, king in all but name. He died in 1420 and was succeeded by his son, Murdoch Stewart, Duke of Albany, who would be executed for treason when James returned to Scotland in 1425, almost causing the complete ruin of the Albany Stewarts.
Robert Stewart was the second son of the future King Robert II of Scotland (1316–1390) and of Elizabeth Mure of Rowallan. His parents' marriage was deemed as uncanonical at first, which, in some circle, gave their children and descendants the label of illegitimacy, but the granting of a papal dispensation in 1349 saw their remarriage and their children's legitimisation. Robert's grandfather was Walter Stewart, 6th High Steward of Scotland (1293–1326) and his father was the first monarch of the House of Stewart. His great-grandfather was Robert the Bruce (1274–1329), legendary victor of the Battle of Bannockburn.
Robert Stewart was raised in a large family with many siblings. His older brother John Stewart (1337–1406) became Earl of Carrick in 1368, and would later be crowned King of Scotland under the name Robert III.
In 1361 Stewart married Margaret Graham, Countess of Menteith (1334–1380), a wealthy divorcee who took Robert as her fourth husband. His sister-in-law's claim to the Earldoms of Menteith and Fife allowed him to assume those titles, becoming Earl of Menteith and Earl of Fife. In 1362 the couple had a son and heir, Murdoch Stewart, (1362–1425) who would in time inherit his father's titles and estates.
Stewart was responsible for the construction of Doune Castle, which remains largely intact today. When Stewart was created Earl of Menteith, he was granted the lands on which Doune Castle now stands. Building may have started any time after this, and the castle was at least partially complete in 1381, when a charter was sealed here.
Scottish politics in the late 14th century was unstable and bloody, and much of Albany's career would be spent acquiring territory, land and titles, often by violent means. In 1389 his son Murdoch Stewart was appointed Justiciar North of the Forth, and father and son would now work together to expand their family interest, bringing them into violent confrontation with other members of the nobility such as Donald McDonald, 2nd Lord of the Isles.
During the reign of their infirm father as King Robert II (1371–1390), Robert Stewart and his older brother Lord Carrick functioned as regents of Scotland, kings in all but name, with Albany serving as High Chamberlain of Scotland. He also led several military expeditions and raids into the Kingdom of England.
In 1389, the Earl of Carrick became incapacitated in an accident and, though he nevertheless acceded to the throne as King Robert III in 1390, this "sickness of the body" caused control of the kingdom eventually to devolve in 1399 to his son and heir apparent, David Stewart, Duke of Rothesay, who held the first dukedom created in the Scottish Peerage. Although in 1398 Robert was himself appointed Duke of Albany, bringing him still greater power and wealth, power had begun to shift away from Albany and towards his nephew.
However, the English soon invaded Scotland, and serious differences emerged between Albany and Rothesay. In 1401, Rothesay was accused of unjustifiably appropriating sums from the customs of the burghs on the east coast and confiscating the revenues of the temporalities of the vacant bishopric of St Andrews. Rothesay had also in conjunction with his uncle, Alexander Stewart, Earl of Buchan, confronted Albany's influence in central Scotland—as soon his lieutenancy expired in 1402 Albany acted swiftly and ruthlessly. Rothesay was arrested and imprisoned in Albany's Falkland Castle where he died in March 1402. Rothesay's death probably lay with Albany and Douglas who would have looked upon the possibility of the young prince acceding to the throne with great apprehension. Albany certainly fell under suspicion but he was cleared of all blame by a general council, which found that 'by divine providence and not otherwise, it is discerned that he [Duke Rothesay] departed from this life.' 
However, even though Albany was exonerated from blame, suspicions of foul play persisted, suspicions which never left Rothesay's younger brother the future James I of Scotland, and which would eventually lead to the downfall of the Albany Stewarts. John Debrett, writing in 1805, was in no doubt of Duke Robert's motives and guilt:
After Rothesay's death, the King began to fear for his second son James, who fled Scotland for his own safety. Debrett continues:
After the death of his brother King Robert III, Albany ruled Scotland as regent. His young nephew, the future James I of Scotland, would remain in exile and imprisonment in England for 18 years. Perhaps unsurprisingly Albany made little effort to secure the young Prince's ransom and return to Scotland, focusing his energies instead on securing his own power and interest.
Albany's political triumph did not settle his differences with the other members of the nobility, in particular Donald McDonald, 2nd Lord of the Isles, who in 1411 led an army of clansmen from the Northwest Highlands into open battle with the Stewarts. This conflict began when Albany had attempted to secure the Earldom of Ross for his second son John, despite McDonald's better claim. At the Battle of Harlaw (known as "Red Harlaw" on account of its savagery)  on 24 July 1411, losses were heavy on both sides, though McDonald's eventual withdrawal allowed the Stewarts to claim a strategic victory. The Stewart army was led by Albany's nephew, Alexander Stewart, Earl of Mar, who would later sit on the jury of knights and peers which convicted Albany's son Murdoch Stewart, Duke of Albany and two of his sons of treason, virtually annihilating the Albany Stewarts.
Albany married twice. Firstly, in 1361, he married Margaret Graham, Countess of Menteith, (1334–1380) a wealthy divorcee who took him as her fourth husband. His sister-in-law's claim to the Earldoms of Menteith and Fife allowed him to assume those titles after marriage. The couple had eight children, seven daughters and a son:
Margaret died in 1380 and Albany subsequently married Muriella Keith, with whom he had three children:
The Duke of Albany died in 1420 in Stirling Castle and lies buried in Dunfermline Abbey in Fife. He was succeeded as Duke of Albany and Regent of Scotland by his son, Murdoch Stewart, Duke of Albany. But Murdoch would not enjoy his power for long. In 1425 the exiled King James, captive in England for 18 years, finally returned to Scotland, and executed Murdoch and most of his family for treason, causing the almost complete ruin of the Albany Stewarts.
Murdoch Stewart's sole surviving male heir was his youngest son, James the Fat, who fled to Ireland after a brief rebellion against the King over the arrest of his father and brothers. James remained in Ireland, unable to return, and died there in 1429. He was never able to inherit his father's titles, since they had been declared forfeit.
Albany's great-grandson, James "Beg" Stewart, (c. 1410-1470) would eventually secure a pardon from the King and return to Scotland, though the family would never recover their lost estates. James "Beg" Stewart is the ancestor of the Stewarts of Ardvorlich on Lochearnside, whose family history is recounted by Sir Walter Scott in A Legend of Montrose.
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