The ghostly traces of the words “Baltimore and Ohio Railroad” painted on the brick wall give a clue to the former life of the substantial building that anchors the east end of Fell Street. Designed by architect E. Francis Baldwin in 1897 for the…

Today the site of Under Armour's world headquarters, five of these buildings used to house Procter & Gamble's Baltimore Plant: Process Building (1929), the Soap Chip Building (1929), the Bar Soap Building (1929), the Warehouse (1929),…