Final answer:
The claim that St. Petersburg was once the capital of Russia is true. It served as the capital in the 18th century under Peter the Great but was later replaced by Moscow after the Bolshevik Revolution.
Step-by-step explanation:
The statement that St. Petersburg was once the capital of Russia is true. This city, founded by Peter the Great in the early 18th century, served as the capital of the Russian Empire for many years. Known for its cultural significance and architectural beauty, St. Petersburg was envisioned by Peter the Great as a modern city that could rival other European capitals.
Its role as the seat of government was established to facilitate access to the Baltic Sea and to represent a modern Russia to the world. However, the capital was eventually moved back to Moscow following the rise of the Soviet regime after the Bolshevik Revolution. St. Petersburg has undergone several name changes throughout its history, being called Petrograd and then Leningrad, but its historic legacy as a capital city and cultural center remains undisputed.