The 11th century was defined by the calendar of Earth as occurring from the year 1001 through the year 1100.


On Earth, Irish warriors led by King Brian Boru defeat invading Vikings at the Battle of Clontarf. Brian Boru is killed by the Vikings during the battle. (DS9: "Bar Association")
Warriors in the First Crusade capture Jerusalem. (TOS: "The Squire of Gothos"; DS9: "Q-Less"; VOY: "The Killing Game")
10th century Timeline 12th century

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