Michael VIII Palaiologos was proclaimed co-emperor of the Byzantine Empire on January 1, 1259 through a coup, becoming the senior co-ruler to the young John IV Laskaris. He later became the sole emperor in 1261 after overthrowing and blinding John IV.
He went on to the restoration of the Byzantine Empire after the fall of Constantinople in 1204. This event established the last ruling dynasty of the empire, the Palaiologan dynasty which ruled for nearly two centuries until the empire's fall in 1453.