The B&O Warehouse is a building in Baltimore, Maryland, adjacent to Oriole Park at Camden Yards. It was constructed by the Baltimore and Ohio Railroad (B&O) beginning in 1899, with later sections completed in 1905, adjacent to the B&O's Camden Station and freight yard at Camden and Eutaw streets. Often purported to be the longest brick building on the East Coast, the 1,116-foot (340 m) long, eight-story brick structure had 430,000 square feet (almost 40,000 m²) of floor space for merchandise storage and distribution, large enough to hold 1,000 carloads of freight at a time, the B&O advertised. Railroad historian Herbert H. Harwood proclaimed it an "awesome structure ... a truly classic turn-of-the-century railroad warehouse." The warehouse was used by the B&O through the 1960s but was most