1. In 1777, the Continental Congress approved the Articles of Confederation, the first constitution of the United States. This historic event took place during the American Revolution, and Massachusetts played a key role in the fight for independence.

2. On November 15, 1806, former Vice President Aaron Burr was arrested in Alabama by order of President Thomas Jefferson, who accused him of conspiring to establish a separate nation in the Louisiana Territory. Burr's trial took place in Massachusetts in 1807, and he was acquitted of all charges.

3. The Boston Tea Party occurred on December 16, 1773, but Massachusetts patriots made their intentions clear on November 15th when they gathered at the Old South Meeting House to protest the British government's tea tax. This event set the stage for the Boston Tea Party and other acts of colonial resistance.

4. In 1854, the Massachusetts legislature authorized the creation of the Boston Public Library, the first municipal library in the United States. The library opened its doors to the public in 1858 and has since become one of the largest and most prestigious libraries in the world.

5. On November 15, 1989, the Velvet Revolution began in Czechoslovakia, leading to the overthrow of the communist government and the establishment of a democratic government. This peaceful revolution inspired similar movements around the world, including the fall of the Berlin Wall and the end of the Cold War.