The Khanate of Astrakhan, also referred to as the Xacitarxan Khanate, was a Tatar state that arose during the break-up of the Golden Horde. Ivan defeated and annexed the Khanate of Kazan on the middle Volga in 1552 and later the Astrakhan Khanate, where the Volga meets the Caspian Sea. These victories transformed Russia into a multiethnic and multiconfessional state, which it continues to be today. The tsar now controlled the entire Volga River and gained access to Central Asia. The new Astrakhan fortress was built in 1558 by Ivan Vyrodkov to replace the old Tatar capital. The annexation of the Tatar khanates meant the conquest of vast territories, access to large markets and control of the entire length of the Volga River. Subjugating Muslim khanates turned Muscovy into an empire.