The 11th century turned out to be a critical period for the Byzantine state. An event of crucial importance for the fate of the Empire was the Schism that occured between the Roman and the Eastern Churches in 1054, during the patriarchy of Michael Keroularios. The Patriarch Michael Keroularios sitting on a throne with clergymen. Illustration from the Madrid Chronicle of John Skylitzes, middle of the 12th century.
Madrid, Biblioteca Nacional, fol. 225a
© Biblioteca Nacional, Madrid