By the 6th century there were in total three Nubian kingdoms: Nobatia in the north, which had its capital at Pachoras (Faras); the central kingdom, Makuria centred at Tungul (Old Dongola), about south of modern Dongola; and Alodia, in the heartland of the old Kushitic kingdom, which had its capital at Soba (now a suburb of modern-day Khartoum). Still in the sixth century they converted to Christianity. In the seventh century, probably at some point between 628 and 642, Nobatia was incorporated into Makuria.