English: A PNC Bank branch, located at 301 7th Street, N.W., (between Indiana Avenue and Pennsylvania Avenue, N.W.), in the Penn Quarter neighborhood of Washington, D.C. The office of the Embassy of Argentina's naval attaché is located on the second floor; entrance to the Argentine Naval Attaché Building is located at 630 Indiana Avenue, N.W., on the north side of the bank.

Built in 1889 by Daniel J. Macarty, the marble and granite, three-story, Richardsonian Romanesque bank was designed by prominent architect James G. Hill. From 1889 to 1954, the building served as headquarters of the National Bank of Washington – founded in 1809, dissolved in 1990. After the main office was moved to 621 14th Street, N.W., the building was known as the Washington Office of the National Bank of Washington. From 1990 to 2005, the building served as a branch of Riggs Bank. The current owner resulted from the merger of Riggs Bank and PNC Financial Services.

The Washington Office of the National Bank of Washington was listed on the National Register of Historic Places (NRHP) in 1974. The building is designated as a contributing property to the Downtown Historic District, listed on the NRHP in 2001, and the Pennsylvania Avenue National Historic Site, designated a National Historic Site in 1965. In addition, the building is designated as a D.C. Historic Landmark, listed on the District of Columbia Inventory of Historic Sites in 1968.