On 6 March 1867, the Royal Academy signed the lease for its new premises at 
Burlington House (click for geospatial location). The Academy had previously shared the premises of the National Gallery in Trafalgar Square. The move was prompted by a Royal Commission report of 1863 that recommended that both institutions required additional space. Image: William Shipley, Nineteenth-Century Illustration of the Royal Academy of Arts in Piccadilly, London. This image is in the public domain in the United States because its copyright has expired.
Articles
Pamela Fletcher, “On the Rise of the Commercial Art Gallery in London”
