Crookston Castle is a ruined medieval castle in the Pollok area of Glasgow, Scotland. It is located some 5 miles (8 km) south-west of the city centre, on a hill overlooking the Levern Water, just before its confluence with the White Cart Water. Crookston Castle was built by the Stewarts of Darnley around 1400, and is set within earthworks constructed in the 12th century. Once the property of the earls and dukes of Lennox, the castle was extensively repaired following a siege in 1544, and it is the only surviving medieval castle in Glasgow. History Crookston is surrounded by a defensive ring ditch that dates back to the 12th century when Sir Robert de Croc, who also gave his name to the village of Crookston, built a timber and earth castle. Remains of a chapel founded by de Croc in 1180 have been uncovered. Evidence of an even earlier fortification on the same site has also been found. The lands of Crookston were bought by Sir Alan Stewart in 1330, and passed to Sir John Stewart of Darnley, in 1361. The Darnley Stewarts replaced the early castle with the present stone structure around 1400. In 1489 the Stewart Earl of Lennox rebelled against James IV. James responded by bringing the cannon Mons Meg from Edinburgh and bombarding the castle, virtually destroying its western end and ensuring a quick surrender. On 3 April 1544, the castle was besieged and taken by the Earl of Arran and Cardinal Beaton, while the then Earl of Lennox was defending Glasgow Castle. At this time, Crookston was regarded as the principal house of the earls of Lennox. Regent Arran installed five gunners in the castle in May 1544. Most famous of the Darnley Stewarts was Henry Stuart, Lord Darnley, who was second husband to Mary, Queen of Scots. It may have been at Crookston that the couple were betrothed, under a yew tree. The yew was felled in 1816, and a model of Crookston Castle, now on display in Pollok House, was carved from its wood. In 1572, Crookston was granted to another Stewart, Charles, the Earl of Lennox. In 1703 the Duke of Lennox sold the castle to the Duke of Montrose, and it remained the property of the Dukes of Montrose until 1757, when it was sold by William Graham, 2nd Duke of Montrose to the Maxwells of Pollok. Following several years of