1. First American Concert - In 1731, the first American concert was held in Boston, Massachusetts. The occasion featured a performance by a local choir and orchestra, which played music composed by German immigrants.

2. The First Bank Robbery - On April 3, 1798, the first bank robbery in United States history took place in Beverly, Massachusetts. The robbers were never caught, and the bank was closed shortly thereafter.

3. First Subway System - In 1895, the first subway system in the United States began operating in Boston, Massachusetts. The system was initially called the Tremont Street Subway and is now part of the MBTA Green Line.

4. Molasses Flood - On January 15, 1919, a giant molasses storage tank exploded in the North End of Boston, sending a wave of molasses through the streets at a speed of 35 miles per hour. The disaster killed 21 people and injured more than 150 others.

5. First State Abolishment of Slavery - In 1783, Massachusetts became the first state to abolish slavery in the United States, following a court case that declared slavery incompatible with the state's constitution.