1. Maryland became the seventh state to ratify the U.S. Constitution on November 3, 1787. This was a significant step in the formation of the United States government.

2. On November 3, 1857, the B&O Railroad completed the Thomas Viaduct, which spans the Patapsco River in Howard County. At the time, it was the longest railroad bridge in the world.

3. November 3, 1948, marked the opening of the Baltimore City Coliseum. The arena hosted numerous events, including concerts, boxing matches, and ice shows, before closing in 1980.

4. On November 3, 1956, the Maryland Terrapins football team defeated the Miami Hurricanes 20-0 at Memorial Stadium in Baltimore. This was the first-ever meeting between the two teams.

5. November 3, 1992, was a historic day for women in politics. Barbara Mikulski, a Democrat from Baltimore, was elected to her fourth term in the U.S. Senate, becoming the first woman to be elected to the Senate four times.