📅 Today in HistorySeptember 20

Agnes of Poitou and Andrew I of Hungary meet to negotiate about the border territory of Burgenland.

At the Battle of Fulford, Harald Hardrada defeats earls Morcar and Edwin.

Saladin begins the Siege of Jerusalem.

The Great Prussian Uprising among the old Prussians begins against the Teutonic Knights.

Cardinal Robert of Geneva is elected as Pope Clement VII, beginning the Papal schism.

The Nankai tsunami washes away the building housing the Great Buddha at Kōtoku-in; it has been located outside ever since.

Ferdinand Magellan sets sail from Sanlúcar de Barrameda with about 270 men on his expedition which ultimately culminates in the first circumnavigation of the globe.

A number of conspirators in the Babington Plot are hanged, drawn and quartered.

The Spanish-held Dutch town of Grave capitulates to a besieging Dutch and English army under the command of Maurice of Orange.

The Treaty of Ryswick is signed by France, England, Spain, the Holy Roman Empire and the Dutch Republic, ending the Nine Years' War.