610 Byzantine Emperor Heraclius' fleet took Constantinople. He was responsible for introducing Greek as the Eastern Empire's official language.
869 4th Council of Constantinople (8th Ecumenical Council) opened.
1143 King Alfonso VII of Leon and Castile (Emperor of all Spain) recognized Portugal as a Kingdom.
1518 Princess Mary Tudor and the Dauphin François were officially betrothed.
1553 Queen Mary's first Parliament met and declared Katherine of Aragon's marriage to Henry VIII legitimate, and also declared the Queen's birth legitimate.