English: The center building is Riggs National Bank located at 1503-1505 Pennsylvania Avenue NW in downtown Washington, D.C. Construction of the Classical Revival style building was completed in 1902 to the designs of architectural firm York and Sawyer. The building served as a branch for PNC Bank following the dissolution of Riggs Bank in 2005. On the right is the American Security and Trust Company Building located at 1501 Pennsylvania Avenue NW. Construction of the neoclassical style building was completed in 1905 also to the designs of York and Sawyer. The property currently serves as a branch for Bank of America. Each building (the two properties are sometimes mistakenly thought to be a single building) was listed on the National Register of Historic Places (NRHP) in 1973. In addition, the buildings are designated contributing properties to the Lafayette Square Historic District, a National Historic Landmark added to the NRHP in 1970, and the Fifteenth Street Financial Historic District, listed on the NRHP in 2006.