Maximus IV of Constantinople (Greek: Μάξιμος), previously known as Manasses (Μανασσῆς), was an Orthodox Christian monk and bishop.
He was abbot of the Vatopedi monastery on Mount Athos before being appointed by Symeon I of Constantinople as Metropolitan bishop of Serres, which he governed under the religious name of Manasses.
[1]: 198 On his election, he changed his name to Maximus, an unparalleled case in the history of the Ecumenical Patriarchate[2] because usually a monastic name is maintained throughout an ecclesiastic career.
As Patriarch, he defended the rights of Orthodox Christians living in territories under the Republic of Venice.
[4] After his resignation, he remained actively involved with ecclesiastic issues, even plotting against his successor Nephon II of Constantinople, until he was forced to retire in the monastery of Vatopedi, where he died at an unknown date.