On This Day: May 27th

The Pitt-Tierney duel takes place on Putney Heath outside London. A bloodless duel between the prime minister of Great Britain William Pitt the Younger and his political opponent George Tierney.

The Battle of Oulart Hill takes place in Wexford, Ireland; Irish rebel leaders defeat and kill a detachment of militia.

Tsar Peter the Great founds the city of Saint Petersburg.

Manchu regent Dorgon defeats rebel leader Li Zicheng of the Shun dynasty at the Battle of Shanhai Pass, allowing the Manchus to enter and conquer the capital city of Beijing.

A Gaelic Irish army successfully ambushes an English force in the battle of Clontibret during the Nine Years' War.

Richard of Cornwall, and his wife, Sanchia of Provence, are crowned King and Queen of the Germans at Aachen Cathedral.

John is crowned King of England.

Malcolm IV becomes King of Scotland.

Richard III of Capua is anointed as Prince two weeks before his untimely death.

Count Emicho enters Mainz, where his followers massacre Jewish citizens. At least 600 Jews are killed.