This Day in History
Today: November 18, 2025
326
The old St. Peter's Basilica is consecrated by Pope Sylvester I.[1]
401
The Visigoths, led by king Alaric I, cross the Alps and invade northern Italy.[2]
1095
The Council of Clermont begins: called by Pope Urban II, it led to the First Crusade to the Holy Land.[3]
1105
Maginulfo is elected Antipope Sylvester IV in opposition to Pope Paschal II.[4]
1210
Pope Innocent III excommunicates Holy Roman Emperor Otto IV for invading the Kingdom of Sicily after promising to recognize papal control over it.[5]
1302
Pope Boniface VIII issues the Papal bull Unam sanctam, claiming spiritual supremacy for the papacy.[6]
1421
St Elizabeth's flood: A dike in the Grote Hollandse Waard in the Netherlands breaks, killing about 10,000 people.[7]
1493
Christopher Columbus first sights the island now known as Puerto Rico.[8]
1601
Tiryaki Hasan Pasha, an Ottoman provincial governor, routs the Habsburg forces commanded by Archduke Ferdinand II of Austria who were besieging Nagykanizsa.[9]
1626
The new St. Peter's Basilica in Rome is consecrated.[10]
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