abandonment, the castle was partially restored by the Maxwells in 1847, to honour Queen Victoria's visit to Glasgow. In 1931, Crookston became the first property acquired by the National Trust for Scotland, having been presented by Sir John Maxwell Stirling-Maxwell, who was one of the Trust's founder members and first Vice Presidents. Today, Crookston Castle is a scheduled monument. Its maintenance is the responsibility of Historic Environment Scotland, and the castle is open to the public. It is the second-oldest building in Glasgow, after Glasgow Cathedral. Architecture Crookston Castle sits atop a natural hill, emphasised by the early ring ditch, which can still be seen. To the north is a steep drop to the Levern Water. The castle has a rectangular main block, which was strengthened by a tower at each corner. This formed an irregular 'X-plan' shape, an unusual layout also seen at Hermitage Castle. Only the north-east corner tower survives to its former height, as well as the basement of the south-east tower. The two western towers were destroyed in the 15th century and never rebuilt, repairs in the 19th century have obscured even the remains of these. The main body of the castle measures about 19 m by 12 m, with walls up to 3.7 m thick, and the north-east tower is around 6m square. The entrance is on the north side, adjacent to the north-east tower, and defended by a portcullis and two doors. A straight mural stair leads up to the right, while ahead is a barrel-vaulted basement with slit windows and a well. The hall is at first-floor level, and was also vaulted, rising to 8.3 m high. A turnpike stair in the south-east corner gave access to another storey above the hall, as well as upper rooms in the eastern towers. The towers had one room on each floor. In the basement of the north-east tower is a prison only accessible from above, while at the top there is access to the four storeys of the tower, via modern iron ladders, opening onto an impressive view from the roof. The top of the north-east tower, including corbels, was also rebuilt in the 19th century. Verse and fiction The poets Robert Burns, William Motherwell and Robert Tannahill have all mentioned the castle in their works, while Sir Walter Scott, in his 1820 novel The Abbot, suggested Mary, Queen of Scots, watched the Battle of