A canal connecting it to another river that begins in Novomoskovsk, the (*) Don, provides a navigable link between the Sea of Azov and the Caspian Sea.
Ancient names for this river include Rav and Itil. The Gorky Hydroelectric Plant and reservoir were built on it in 1955. Penza and Vasilsursk are cities that lie on one of its tributaries, the Sura. The city of Udmurtia marks the start of another tributary called the Kama. A canal connecting it to another river that begins in Novomoskovsk, the (*) Don, provides a navigable link between the Sea of Azov and the Caspian Sea. It flows east to Kazan and then south into the Caspian Sea. For 10 points, name this western Russian river, the longest in Europe.
Ancient names for this river include Rav and Itil. The Gorky Hydroelectric Plant and reservoir were built on it in 1955.
{Volga} River