1258

{| align=right cellpadding=3 id=toc style="margin-left: 15px;"\n|- \n| align="center" colspan=2 | Years:
1255 1256 1257 - 1258 - 1259 1260 1261\n|-\n| align="center" colspan=2 | Decades:
1220s 1230s 1240s - 1250s - 1260s 1270s 1280s\n|- \n| align="center" | Centuries:
12th century - 13th century - 14th century\n|} Events\n* February 10 - Mongols overrun Baghdad, burning it to the ground and killing 800,000 citizens\n* Llywelyn the Last declares himself Prince of Wales. He is the final ruler of an independent Wales, before its conquest by the English.\n* 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\n* Osman I, founder of the Ottoman Empire Deaths\n* Theodore II Lascaris, emperor of Nicaea Monarchs/Presidents\n* Aragon - James I King of Aragon and count of Barcelona (reigned from 1213 to 1276) \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n