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Centuries: 12th century - 13th century - 14th century Decades: 1200s 1210s 1220s 1230s 1240s - 1250s - 1260s 1270s 1280s 1290s 1300s Years: 1253 1254 1255 1256 1257 - 1258 - 1259 1260 1261 1262 1263 Events February 10 - Mongols overrun Baghdad, burning it to the ground and killing 10,000 citizens Llywelyn the Last declares himself Prince of Wales. He is the final ruler of an independent Wales, before its conquest by the English. John IV Lascaris succeeds his father Theodore II Lascaris as emperor of Nicaea[?]. Due to his young age, he is appointed as regent Michael VIII Palaeologus. Births Osman I, founder of the Ottoman Empire Deaths Theodore II Lascaris, emperor of Nicaea[?]
Decades: 1200s 1210s 1220s 1230s 1240s - 1250s - 1260s 1270s 1280s 1290s 1300s
Years: 1253 1254 1255 1256 1257 - 1258 - 1259 1260 1261 1262 1263
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