1235

Events 
 The Normans invade Connacht.
 St. Elizabeth of Hungary is canonized by Pope Gregory IX. She died on November 17 1231 at age 24, either from physical fatigue or from disease, in Marburg.
 A general inquisition begins in France.
 The Byzantine emperor John III Ducas Vatatzes and the Bulgarian tsar Ivan Asen II besiege Constantinople in an attempt to take it from its Latin rulers, John of Brienne and Baldwin II. Angelo Sanudo successfully negotiates a two-year truce.
 Sundiata Keita's victory at the Battle of Kirina marks the beginning of the Mali Empire.
 The Lancaster Royal Grammar School is founded.
 A Chinese text of this year records that Hangzhou City, the capital of the Song Dynasty, held various social clubs that included a West Lake Poetry Club, the Buddhist Tea Society, the Physical Fitness Club, the Anglers' Club, the Occult Club, the Young Girls' Chorus, the Exotic Foods Club, the Plants and Fruits Club, the Antique Collectors' Club, the Horse-Lovers' Club, and the Refined Music Society.

 Births 
 Henry of Almain, King of the Romans (died 1271)
 Pope Boniface VIII (approximate date; died 1303)
 Dafydd ap Gruffydd, Prince of Wales (died 1283)
 Ramon Llull, Catalan writer and philosopher (died 1315)
 Saint Rose of Viterbo (died 1252)
 Arnold of Villanova, Spanish alchemist and physician (died 1311)
 Qian Xuan, Chinese painter (d. 1305)

 Deaths 
 January 14 – Saint Sava of Serbia (born 1175)
 September 5 – Henry I, Duke of Brabant (born 1165)
 October 26 – Andrew II of Hungary (born 1175)
 Rabbi David Kimhi, Biblical commentator (born 1160)