The 13th century was defined by the calendar of Earth as occurring from the year 1201 through the year 1300.
- All life on the planet Zetar is extinguished in a war. Only about a hundred individuals survive as energy patterns representing their thoughts. (TOS: "The Lights of Zetar")
- The Elysian Ruling Council is formed in the Delta Triangle region. (TAS: "The Time Trap")
- The father of Wu is living on the planet Omega IV. (TOS: "The Omega Glory")
- Fourth Crusade on Earth results in the Sack of Constantinople. (TOS: "The Squire of Gothos"; DS9: "Q-Less"; VOY: "The Killing Game")
- Crusades Five through Nine on Earth (1217-21, 1228-29, 1248-54, 1270, 1271-72). The Seventh was against an army made migrant by Genghis Khan's Mongol horde. (TOS: "The Squire of Gothos"; DS9: "Q-Less"; VOY: "The Killing Game")
- Fall of the Sung Dynasty to the grandson of Genghis. All of China is henceforth administered from Xanadu, on the hither edge of Mongolia. The Sung had reigned for over three hundred years; their artisans produced the statue of a horse that Captain Picard later presents to Lutan. (TNG: "Code of Honor")
|12th century||Timeline||14th century|