Constantine Palaiologos

Constantine Palaiologos (c. 1230–1271) was a younger son of the megas domestikos Andronikos Palaiologos and the half-brother of Emperor Michael VIII. After Michael's accession he was made Caesar in 1259 and sebastokrator the next year, and he married Irene Komnene Laskarina Branaina.

He led the Byzantine army into the Morea against the Latin Principality of Achaea, but his campaign ended in defeat at the Battle of Prinitza. He later became a monk under the name Kallinikos and died in 1271.