1. In 1919, the Baltimore Symphony Orchestra, founded earlier that year, held its first concert at the Lyric Theatre, with Gustav Strube as conductor.

2. On December 11, 1835, the Maryland Jockey Club became the first in the United States to offer a $50,000 purse for a horse race. The race, held at the Pimlico Race Course, was won by the thoroughbred "Fashion".

3. In 1972, the Baltimore Colts defeated the Dallas Cowboys 35-0 in a Monday Night Football game that became known as the "Greatest Game Ever Played" in the Colts' franchise history.

4. December 11, 1826 marks the date the Mason-Dixon Line, which had served as the boundary between Maryland and Pennsylvania, was officially surveyed and marked.

5. The USS Maryland (BB-46), a battleship named in honor of the state, played a significant role in World War II, including the attack on Pearl Harbor. The USS Maryland was decommissioned in 1947 and is now a museum ship in Hawaii.