July 16
622 - The beginning of the Islamic calendar.
1429 - Joan of Arc leads French army in Battle of Orleans
1790 - Congress establishes District of Columbia
1809 - The city of La Paz, in what is today Bolivia, declared its independence from Spanish Crown
1861 - Battle of Bull Run, the 1st major battle of the Civil War, is fought
1945 - 1st atomic bomb detonated, Trinity Site, Alamogordo, New Mexico
1969 - Apollo 11, carrying 1st men to land on Moon, launched
1973 - During Watergate hearings, Butterfield reveals existence of tapes
At least that's what I found most interesting.