1536 Anne Boleyn, the second wife of England's King Henry VIII, was beheaded after she was convicted of adultery.
1643 Delegates from four New England colonies met in Boston to form a confederation.
1906 The 19 km long Simplon Tunnel linking Italy and Switzerland through the Alps is officially opened.
1926 Thomas Edison spoke on the radio for the first time.
1967 U.S. planes bombed Hanoi for the first time.
2000 The bones of the most complete and best-preserved Tyrannosaurus rex skeleton went on display in Chicago.