Cosmas II of Constantinople
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Cosmas II Atticus (Greek Κοσμάς Β' ο Αττικός) was a 12th century clergyman who served as Patriarch of Constantinople from 1146 until 1147.
Cosmas was originally from the island of Aegina. He served, under Byzantine emperor Manuel I Comnenus, as Patriarch of Constantinople, from April 1946 until February 1147, when he was accused of being a heretic and a conspirator against the emperor and was forced to resign.