John IV Lascaris was only a boy of 8 years when he was elevated as emperor of the Nicaean Empire in 1258 on the death of his father Theodore II Lascaris. He was the last of the Lascaris emperors that had done much to restore the Byzantine Empire after the capture of Constantinople by the Fourth Crusade in 1204. His regent was Michael Palaeologus, who later made himself co-emperor as Michael VIII. Upon Michael's conquest of Constantinople in 1261, John was ordered blinded, thus making him ineligible to serve as emperor, then imprisoned in a castle on the Sea of Marmara. He is recorded as having acknowledged Andronicus II as emperor in 1290. The Empire of Nicaea was the largest of the states founded by refugees from the Byzantine Empire after Constantinople was conquered during the Fourth Crusade. ... Events= February 10 - Mongols overrun Baghdad, burning it to the ground and killing 800,000 citizens Llywelyn the Last declares himself Prince of Wales. ... Theodore II Lascaris (died August 1258) was Byzantine emperor, in exile in the Empire of Nicaea, from 1254 to 1258. ... The Byzantine Empire is the term conventionally used to describe the Greek-speaking Roman Empire during the Middle Ages, centred at its capital in Constantinople. ... Map of Constantinople. ... The Fourth Crusade (1202–1204), originally designed to conquer Jerusalem by taking Egypt first, instead, in 1204, sacked and conquered the Orthodox Christian city of Constantinople, capital of the Byzantine Empire. ... // Events February - Byzantine emperor Alexius IV is overthrown in a revolution, and Alexius V is proclaimed emperor. ... Michael VIII (1225 - December 11, 1282) was the founder of the Palaeologos dynasty that would rule the Byzantine Empire to the Fall of Constantinople in 1453. ... Events July 25 - Constantinople re-captured by Nicaean forces under the command of Michael VIII Palaeologus, Byzantine Empire re-formed August 29 - Urban IV becomes Pope, the last man to do so without being a Cardinal first Bela IV of Hungary repels Tatar invasion Charles of Anjou given rule of... Sea of Marmara The Sea of Marmara (Turkish: Marmara Denizi, Modern Greek: Θάλασσα του Μαρμαρά or Προποντίδα) (also known as the Sea of Marmora or the Marmara Sea) is an inland sea that connects the Black Sea to the Aegean Sea, thus separating the Asian part of Turkey from its European part. ... Andronicus II Palaeologus (1260 - February 13, 1332), Byzantine emperor, was the elder son of Michael VIII Palaeologus, whom he succeeded in 1282. ... Events King Edward I of England banishes all Jews from Britain. ...

Theodore II Lascaris (died August 1258) was Byzantine emperor, in exile in the Empire of Nicaea, from 1254 to 1258. ... This is a list of the Emperors of the late Roman Empire, called Byzantine. ... The Empire of Nicaea was the largest of the states founded by refugees from the Byzantine Empire after Constantinople was conquered during the Fourth Crusade. ... Michael VIII (1225 - December 11, 1282) was the founder of the Palaeologos dynasty that would rule the Byzantine Empire to the Fall of Constantinople in 1453. ...