1221

Decades: 1170s 1180s 1190s 1200s 1210s - 1220s - 1230s 1240s 1250s 1260s 1270s

Years: 1216 1217 1218 1219 1220 - 1221 - 1222 1223 1224 1225 1226

• End of the reign of Emperor Juntoku of Japan
• Emperor Chukyo briefly reigns over Japan
• Emperor Go-Horikawa ascends to the throne of Japan
• Merv sacked by the Mongols
• Revolt against rulers of Chichen Itza by Maya of the Yucatán

• August 6 - Saint Dominic

• Aragon - James I King of Aragon and count of Barcelona (reigned from 1213 to 1276)
• Castile - Ferdinand III, the Saint King of Castile and Leon (reigned from 1217 to 1252)
• France - Philippe II, Auguste King of France (reigned from 1180 to 1223)
• Holy See - Honorius III pope (from 1216 to 1227)
• Mongol Empire - Genghis Khan, Mongol Khan (from 1206 to 1227)
• Navarre - Sancho VII the Strong King of Navarre (reigned from 1194 to 1234)
• Portugal - Afonso II, the Fat, King of Portugal (reigned from 1212 to 1233)
• Venice - Pietro Ziani Doge of Venice (ruled from 1205 to 1229)