The 1220s was a decade of the Julian Calendar which began on January 1, 1220, and ended on December 31, 1229. Significant people Abu Muhammad al-Wahid, Almohad Caliph of Morocco Abu Zakariya, first Sultan of the Hafsid Dynasty of Ifriqiya Adolf IV, Count of Schauenburg and Holstein Alfonso IX, King of León and Galicia Andrew II, King of Hungary and Croatia Baldwin II, Latin Emperor of Constantinople Konrad I, Duke of Masovia and Kujawy and High Duke of Poland Conrad IV, King of Jerusalem Chiconquiauhtzin, Tlatoani of Azcapotzalco Chūkyō, Emperor of Japan Dōgen, founder of the Sōtō school of Zen Buddhism in Japan Erik XI, King of Sweden Ferdinand III, King of Castile and Toledo Saint Francis of Assisi, Roman Catholic saint Frederick II, Holy Roman Emperor Genghis Khan, first Great Khan of the Mongol Empire Emperor Go-Horikawa of Japan Emperor Go-Toba of Japan Pope Gregory IX Henry III, King of England, Lord of Ireland, and Duke of Aquitaine Pope Honorius III Iltutmish, first Sultan of the Delhi Sultanate Jalal ad-Din Mingburnu, final Sultan of the Khwarezmian Empire James I, King of Aragon and Count of Barcelona Jochi, Mongol army commander and eldest son of Genghis Khan John of Brienne, King of Jerusalem and Latin Emperor of Constantinople John I, King of Sweden John III Doukas Vatatzes, Emperor of Nicaea Emperor Juntoku of Japan Al-Kamil, Ayyubid Sultan of Egypt Knut II, King of Sweden Leszek I the White, Duke of Sandomierz and High Duke of Poland Louis VIII, King of France Louis IX, King of France Lý Chiêu Hoàng, Empress of Vietnam Lý Huệ Tông, Emperor of Vietnam Manqu Qhapaq, first Emperor of the Inca Empire Ögedei Khan, second Great Khan of the Mongol Empire, third son of Genghis Khan Olaf the Black, King of the Isles Ottokar I, King of Bohemia Ramon Berenguer IV, Count of Provence and Count of Forcalquier Rǫgnvaldr Guðrøðarson, King of the Isles Rujing, Caodong Buddhist monk and Zen master Sancho II, King of Portugal Stephen Langton, Archbishop of Canterbury Subutai, Mongol commander and primary military strategist of the Mongol Empire Sukaphaa, first King of Ahom Theodore Komnenos Doukas, Despot of Epirus and Emperor of Thessalonika Tolui, Mongol commander and regent of the Mongol Empire, fourth son of Genghis Khan Trần Thái Tông, Emperor of Vietnam Trần Thủ Độ, military commander and regent of the Empire of Vietnam Valdemar II, King of Denmark Yuri II,