Feb 20 Al-Musta'sim, last Abbasid Caliph of Baghdad, dies in the sack of Baghdad by being rolled up in a carpet and trampled to death Mar 26 Floris, the Guardian, count-regent of Holland, dies Apr 5 Julian of Cornillon/Liege, Flemish visionary/saint, dies Aug 18 Theodore II Lascaris, Emperor of the Empire of Nicaea 1257 Famous Deaths by Year 1259