'''Proterius of Alexandria''' (d. [[457]]) was [[Council of Chalcedon|Chalcedonian]] [[List of Patriarchs of Alexandria|Patriarch of Alexandria]] ([[451]] -[[ 457]]). ElectedHe was elected as successor of Patriarch [[Dioscorus of Alexandria]], who washad been deposed at the [[Council of Chalcedon]] ([[Evagrius Scholasticus]], ''Ecclesiastical History'' (AD 431-594), Book 2, chapter 5]). Due to his [[Council of Chalcedon|Chalcedonian]] theology he was not popular in Alexandria.
His accession markedmarks the beginning of the [[Schism|Schism (Split) of 451]] between the [[List of Coptic Popes|Coptic]] and the [[List of Orthodox Patriarchs of Alexandria|Eastern Orthodox]] patriarchs. In [[457]] the [[Monophysitism|monophysite]] party in Alexandria elected [[Pope Timothy II of Alexandria|Timothy II Aelurus]] as patriarch. Proterius was subsequently murdered [(Evagrius, 2, 8]).
