1. On May 7, 1684, William Penn granted a charter for the town of Germantown, which is now part of Philadelphia. Germantown was founded by a group of German immigrants seeking religious freedom and Penn's charter provided them with a plot of land to build their homes and establish their community.

2. The Pennsylvania Academy of the Fine Arts was founded on May 7, 1805, making it the first art museum and school in the United States. It was established to promote the development of American art and has since become one of the premier institutions for the study and exhibition of contemporary and historic art in the country.

3. On May 7, 1915, the RMS Lusitania was sunk by a German submarine off the coast of Ireland, killing nearly 1,200 people, including 128 American citizens. The sinking of the Lusitania was a significant event in World War I and helped to turn public opinion against the German government, eventually leading to the United States' entry into the war.

4. The University of Pittsburgh's Cathedral of Learning was dedicated on May 7, 1937. The Cathedral of Learning is a 42-story skyscraper and the tallest educational building in the Western Hemisphere. It houses classrooms, offices, and numerous cultural exhibits and classrooms for the university's students.

5. On May 7, 1962, Wilt Chamberlain scored 52 points and grabbed 25 rebounds in Game 5 of the NBA Finals to lead the Philadelphia Warriors to a 129-122 victory over the Boston Celtics. The game has since become known as one of the greatest individual performances in NBA history and helped to establish Chamberlain as one of the greatest basketball players of all time.