The Holy Apostolic and Catholic Assyrian Church of the East under His Holiness Mar Dinkha IV, is a Christian church that traces its origins to the See of Babylon, said to be founded by Saint Thomas the Apostle. It sometimes calls itself the Assyrian Orthodox Church, but should not be confused with the distinct Syriac Orthodox Church, which is an Oriental Orthodox body. In India, it is known as the Chaldean Syrian Church. In the West it is often known, inaccurately, as the Nestorian Church.