August 24 – After touring an army through Aquitaine to assert his right to it, John of England marries 12-year-old Isabella of Angoulême at Bordeaux.
The Iroquois invade modern-day Ohio from the north.
The Mongols defeat Northern China.
The University of Paris receives its charter from Philip II of France.
The rebel Ivanko is captured and executed by the Byzantine general Alexios Palaiologos
January 19 – Dōgen Zenji, founder of Sōtō Zen (d. 1253)
Al-Abhari, Persian philosopher and mathematician (d. 1265)
Ulrich von Liechtenstein, German nobleman and poet (d. 1278)
Adam Marsh, English Franciscan (approximate date; d. 1259)
John Fitzalan, Lord of Oswestry (d. 1240)
Matthew Paris, English Benedictine monk and chronicler (approximate date; d. 1259)
Rabbi Isaac ben Moses of Vienna (d. 1270)
Mindaugas, Great king of Lithuania (born c. 1200, d. 1263)
William of Sherwood, English logician (approximate date; d. c.1272)
Ingerd Jakobsdatter, Danish countess (d. 1258)
April 23 – Zhu Xi, Chinese Confucian philosopher (b. 1130)
December – Gilbert Horal, 12th Grand Master of the Knights Templar
Count Joscelin III of Edessa
Beatritz de Dia (approximate date)
Year 1200 (MCC) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar.