On This Day: June 10th

Thirty Years' War: Battle of Záblatí, a turning point in the Bohemian Revolt.

Willem Barents and Jacob van Heemskerk discover Bear Island.

Council of Trent: Pope Paul III sends out letters to his bishops, delaying the Council due to war and the difficulty bishops had traveling to Venice.

Copenhagen is surrounded by the army of Frederick I of Denmark, as the city will not recognise him as the successor of Christian II of Denmark.

Ottoman Sultan Murad II besieges Constantinople, but is ultimately unsuccessful.

Battle of Mello: The peasant forces of the Jacquerie are crushed by the army of the French nobility.

The Battle of Pelekanon is the last attempt of the Byzantine Empire to retain its cities in Asia Minor.

Pope Honorius III issues the bull Vineae Domini custodes in which he approves the mission of Dominican friars to Morocco.

Third Crusade: Frederick I Barbarossa drowns in the river Saleph while leading an army to Jerusalem.

Emperor Tenji of Japan introduces a water clock (clepsydra) called Rokoku. The instrument, which measures time and indicates hours, is placed in the capital of Ōtsu.