Basilios (or Basilius) Bessarion (in Greek Βασίλειος Βησσαρίων) (2 January 1403 – 18 November 1472), a Roman Catholic Cardinal Bishop and the titular Latin Patriarch of Constantinople, was one of the illustrious Greek scholars who contributed to the great revival of letters in the 15th century. He has been mistakenly known also as Johannes Bessarion due to an erroneous interpretation of Gregory III Mammas.