The Monumentals' home ground was the
Belair Lot, which was sometimes known as the Union Association Grounds. On July 4, 1884, Baltimore played a split double header against the
Cincinnati Outlaw Reds and the run-away league leaders, the
St. Louis Maroons, which saw a sellout crowd in attendance. The field also hosted a home game for the traveling
Chicago Browns team. The team did play one game on August 25, 1884 at the larger Madison Avenue Ground, in a win against the
Washington Nationals. However, the playing field was deemed unfit to use and they returned to the Belair Lot. ==Team nickname==