- 1189 Holy Roman Emperor Frederick I Barbarossa and 100,000 crusaders depart Regensburg for the Third Crusade
- 1751 1st hospital founded (Pennsylvania Hospital) in the 13 Colonies in America
- 1924 Mercedes-Benz is formed by Gottlieb Daimler and Karl Benz, merging the two companies
- 1960 1st contraceptive pill is made available for sale
- 1995 In New York City, more than 170 countries decide to extend the Nuclear Nonproliferation Treaty indefinitely and without conditions.
Waltz introduced into English ballrooms. Some observers consider it disgusting and immoral.
On May 11, 1812