Our Righteous Father '''Jacob of Nisibis''', also ''' ''James of Nisibis'' ''', ''' ''Jacob the Great'' ''', ''' ''Jacob of Mygdonia'' ''',<ref group="note">'''[[w:Nusaybin|Antiochia Mygdonia]]''' was a Seleucid colony in ancient Mesopotamia; in the classical Roman period it was known as '''Nisibis'''; today it is the Turkish town of '''Nusaybin'''.</ref> or ''' ''Mor Ya`qub'' ''', called the "[[Moses]] of Mesopotamia"<ref name="SOCA">Syriac Orthodox Church of Antioch: Archdiocese of the Western U.S. ''[http://www.soc-wus.org/ourchurch/St.%20James%20of%20nisibis.htm St. James (Jacob) bishop of Nisibis, July 15].''</ref><ref name="SMITH">Sir William Smith. ''"[http://books.google.ca/books?id=7eItAAAAIAAJ&printsec=frontcover#v=onepage&q&f=false JACOBUS (4) or JAMES bishop of Nisibis in Mesopotamia]".'' In: '''Volume 3 of A Dictionary of Christian Biography, Literature, Sects and Doctrines: Being a Continuation of 'The Dictionary of the Bible'.''' J. Murray, 1882. p.326.</ref> for his wisdom and wonderworking abilities, was the second bishop of Nisibis,<ref group="note">"The See of Nisibis was founded in 300 by Babu (d. 309). His successor, the celebrated St. James, defended the city by his prayers during the siege of Sapor II." (Siméon Vailhé. ''"[http://oce.catholic.com/index.php?title=Nisibis Nisibis: Titular Archdiocese of Mesopotamia]".'' '''Original Catholic Encyclopedia'''. 1913. El Cajon, California: Catholic Answers. Retrieved 2011-01-22.)</ref> [[Geronta|spiritual father]] of the renowned Syriac writer and theologian [[Ephrem the Syrian]], celebrated [[Asceticism|ascetic]] and one of the 318 fathers of the [[First Ecumenical Council]] at Nicaea.