The Volga River is the longest river in Europe, flowing through central Russia and into the Caspian Sea. It is also known by various other names, depending on the region or culture. The Tatars call it İdel, while the Mari people refer to it as the Volgydo. In ancient times, it was known as the Rha River, and during the Soviet era, it was commonly referred to as the "Mother Volga." Other synonyms for the Volga River include the Volgograd River, as it flows through the city of Volgograd, and the Tsaritsa River, as it was once known as the "queen" of Russian rivers.