伏尔加保加利亚
Bilär (Tatar: Биләр, meaning as: The Great City) - was a medieval city in Volga Bulgaria and its second capital before the Mongol invasion of Volga Bulgaria. It was located on the left bank of the Small Cheremshan River in Alexeeyevsky District of the Tatarstan. The distance to Bilyarsk is 50 km and 150 km to Kazan.