Years: 1224 1225 1226 – 1227 – 1228 1229 1230 Decades: 1190s 1200s 1210s – 1220s – 1230s 1240s 1250s Centuries: 12th century – 13th century – 14th century Events January 11 – The city of Požega is first mentioned in a charter of Andrew II of Hungary. March 19 – Pope Gregory IX succeeds Pope Honorius III as the 178th pope. November 23 – Polish Prince Leszek I the White is assassinated at an assembly of Piast dukes at Gąsaw… (More on 1227)