The Mount Pleasant Library at 1600 Lamont Street, NW in Washington, DC is a branch of the District of Columbia Public Library System that opened in May 1925, and is the third oldest public library building still in use in Washington. Construction of the Mount Pleasant Branch was funded primarily by the Carnegie Corporation and was built to serve the rapidly growing communities of Mount Pleasant and Columbia Heights. The architect, Edward Lippincott Tilton of New York, was an accomplished library designer who planned numerous libraries nationwide. The library site at Lamont and 16th Streets was made available for purchase by Mary Foote Henderson who was instrumental in the development of 16th Street in the early 20th century. The Italian Renaissance design of the building harmonizes with th