Final answer:
Nizhny Novgorod is the city located at the confluence of the Volga and Oka rivers, which was formerly known as Gorky.
Step-by-step explanation:
The city at the confluence of the Volga and Oka river, which was previously called Gorky, is now known as Nizhny Novgorod. It's an important cultural and historical center in Russia and serves as a major transportation hub due to its strategic location at the crossing of these two significant rivers.
The Volga River is the longest river in Europe and is vital for commerce and transportation, connecting Moscow to the Caspian Sea. Nizhny Novgorod has had various historical references and significance throughout the times, including during the Soviet era when it was named after the famous writer Maxim Gorky.