Sir Robert Stodart Lorimer, KBE (4 November 1864 – 13 September 1929) was a prolific Scottish architect and furniture designer noted for his sensitive restorations of historic houses and castles, for new work in Scots Baronial and Gothic Revival styles, and for promotion of the Arts and Crafts movement.
Lorimer was born in Edinburgh, the son of James Lorimer, who was Regius Professor of Public Law at Edinburgh University from 1862 to 1890. In his youth the family lived at 21 Hill Street, a Georgian house in Edinburgh's South Side, very close to Old College, where his father worked.
He was educated at Edinburgh Academy and later at Edinburgh University. He was part of a gifted family, being the younger brother of painter John Henry Lorimer, and father to the sculptor Hew Lorimer. In 1878 the Lorimer family acquired the lease of Kellie Castle in Fife and began its restoration for use as a holiday home.
Lorimer began his architectural career in 1885 working for Sir Robert Rowand Anderson in Edinburgh, and in 1889 for George Frederick Bodley in London, returning to Edinburgh to form his own practice in 1891 with his first major restoration commission at Earlshall Castle in Fife for a friend of his parents.