Спасский район
It was situated at Volga's left tributary Ütäk river's upper stream. In the 10th century it coined its own money. Suar was a political, economical and trade center of Volga Bulgaria. After the Mongol invasion of Volga Bulgaria in 1236 the city lost its importance. It is believed that ruins (fortifications, foundations, ruins of palace) are situated in the present day village of Kuzneçixa, Spassky District, Tatarstan.