Assyrians were once a large ethnic minority in the Ottoman Empire, but following the early 20th century Assyrian genocide, many were murdered, deported, or ended up emigrating. Those that remain live in small numbers in their indigenous South Eastern Turkey (although in larger numbers than other groups murdered in Armenian or Greek genocides) and Istanbul. They number around 30,000 and are part of the Syriac Orthodox Church, Chaldean Catholic Church and Church of the East.