(noun)
according to Christian and/or Jewish scripture, one of the fathers of the Hebrew people or of the human race (e.g. Isaac, Jacob, and Abraham);
e.g. He was the patriarch of the people and was hailed as such.
(noun)
a bishop of one of the ancient or East Orthodox Christian cathedral churches (sees) at Jerusalem, Constantinople, Alexandria, Antioch, and Rome, or a Roman Catholic bishop who ranks immediately below the Pope;
e.g. This is the home of the patriarch of Jerusalem.