Both St Petersburg and Kaliningrad
There is the Russian Enclave of Kaliningrad on rhe Baltic, and St Petersburg which is on the Gulf of Finland, a branch of the Baltic Sea
St Petersburg is located on the Russian coast of the Baltic Sea
The Russian enclave is Kaliningrad
Gdańsk.
St. Petersburg is a port on the Baltic Sea
Czar Peter the Great
The Russian trade route ran from the Baltic Sea to the Black Sea.
The single Russian port that's not frozen over for part of the year is located on the Black Sea.
It is located on the Baltic Sea.
The Russian city closest to the Baltic Sea is Saint Petersburg.
Saint Petersburg
Stockholm is located along the Baltic Sea.