Once Egypt had established political and military mastery over Kush, officials, priests, merchants, and artisans settled in the region. The Egyptian language became widely used in everyday activities. Many rich Kushites took to worshipping Egyptian gods and built temples for them. The temples remained centres of official religious worship until the coming of Christianity to the region during the sixth century. When Egyptian influence declined or succumbed to foreign domination, the Kushite elite regarded themselves as central powers and believed themselves as idols of Egyptian culture and religion.