|The B.F. Saul Building, constructed in 1924 at 925 15th Street NW, is a five-story, Classical Revival-style building designed by notable local architect George N. Ray for the B.F. Saul Company, a major local real estate firm as a combination bank/office building. The building abuts the 1917 Davidson Building on its north and the 1924 Colonial Mortgage Building on its south, and is one of a collection of early 20th-century office buildings that surround McPherson Square. This collection of buildings represents the transition of the square from residential to offices, as well as the growth of the city's financial district from south of I Street to north of McPherson Square. During the 19th century, banks and offices related to the city's financial interests were centered on lower 15th Street across from and north of the Treasury Building and around 14th and G Streets. By the early 20th century, however, the development of office buildings associated with the city's financial markets began to push north to McPherson Square and in the process completely transformed what had been a wealthy residential neighborhood of 19th-century residences into a commercial/office building area.