Complex sentence: The first mention of the settlement is attested as far as the 4th Century A.D. It was an Assyrian Christian village which belonged to the Assyrian Church of the East, before its population joined the Chaldean Catholic Church in the 1830s.
Split into simpler sentences: The first mention of the settlement is attested as far as the 4th Century A.D when it was recognized as an Assyrian Christian village which belonged to the Assyrian Church of the East. Later on Its population joined the Chaldean Catholic Church in the 1830s.