0896 - Formosus ended his reign as Pope.
1541 - Ignatius of Loyola became the first superior-general of the Jesuits.
1581 - Francis Drake completed the circumnavigation of the world.
1687 - King James II ordered that his declaration of indulgence be read in church.
1818 - The U.S. flag was declared to have 13 red and white stripes and 20 stars and that a new star would be added for the each new state.
1918 - The Battle of Somme, an offensive by the British against the German Army ended.
1932 - After five years of research, professor C.G. King, of the University of Pittsburgh, isolated vitamin C.
1945 - Hungary was liberated from Nazi occupation.
1945 - During World War II, U.S. forces liberated the Nazi death camp Ohrdruf in Germany.
1949 - Twelve nations signed a treaty to create The North Atlantic Treaty Organization (NATO).
1968 - Martin Luther King Jr. was assassinated at the age of 39.
1969 - Dr. Denton Cooley implanted the first temporary artificial heart.
1979 - Zulfikar Ali Bhutto, the president of Pakistan, was executed. He had been convicted of conspiring to murder a political opponent.
1984 - U.S. President Reagan proposed an international ban on chemical weapons.
1987 - The U.S. charged the Soviet Union with wiretapping a U.S. Embassy.