Here is a wonderful photo of the United State Department of Treasury and Pennsylvania Avenue. Make sure you check out these great stories about Pennsylvania Avenue at Ghosts of DC.
View of the U.S. Treasury Building on Pennsylvania Ave. at 15th St NW. White House is visible left. Note the horse manure in the street…there have been reports of it still being at either end of Pennsylvania Ave. Photo c. 1901 from family collection.
Source: Gregg Sloan