Original: The Chaldean Catholic Church was established , and its first patriarch was proclaimed patriarch of '' Mosul and Athur '' ( Nineveh and Assyria ) on Feb. 20 , 1553 by Pope Julius III .
Simplified: Chaldean Catholic Church was established , its first patriarch was proclaimed patriarch of '' Mosul and Athur '' ( Nineveh and Assyria ) on Feb. 20 , 1553 by Pope Julius III .