James Gillespie Graham (1776–1855) was a Scottish architect, born in Dunblane. He is most notable for his work in the Scottish baronial style, as at Ayton Castle, and he worked in the Gothic Revival style, in which he was heavily influenced by the work of Augustus Pugin. However, he also worked successfully in the neoclassical style as exemplified in his design of Blythswood House near Glasgow.
Graham designed principally country houses and churches. He is also well known for his interior design, his most noted work in this respect being that at Taymouth Castle and Hopetoun House.
Some of his principal churches include St Andrew's Cathedral in Glasgow, and St Mary's Roman Catholic Cathedral and the Highland Tolbooth Church (now The Hub) in Edinburgh. His houses include Cambusnethan House in Lanarkshire.
He was also responsible for laying out the Drumsheugh area of Edinburgh's New Town, and for the design of Hamilton Square and adjoining streets in the then new town of Birkenhead, England. According to the writer Frank Arneil Walker he may have been responsible for the remodelling of Johnstone Castle, Renfrewshire.[1]