1. On June 27, 1787, Maryland became the seventh state to ratify the United States Constitution. The state's delegates to the Constitutional Convention in Philadelphia had played an influential role in shaping the founding document, particularly in the areas of representation and taxation.

2. The first recorded hot air balloon ascent in Maryland took place on June 27, 1853. A small crowd gathered in Baltimore to watch a gas-filled balloon named the "Young America" rise into the sky, piloted by balloonist John Wise.

3. On June 27, 1922, the first radio station in Baltimore began broadcasting. Called WEAR (later changed to WBAL), the station initially consisted of a small shack on the roof of the Emerson Hotel. Today, WBAL is one of the most well-known news and talk radio stations in the state.

4. Baltimore City College, one of Maryland's oldest public high schools, held its first graduation ceremony on June 27, 1836. The prestigious school, which was founded in 1839, has educated many notable alumni over the years, including writers, politicians, and business leaders.

5. The Maryland State House, which served as the nation's capital for six months in 1783, officially reopened to the public on June 27, 2008, after a two-year restoration. The historic building, located in Annapolis, is the oldest state capitol still in continuous legislative use.