Kronstadt Sea Festival in Kronstadt
Kronstadt Sea Festival is understood here as the maritime public festival held in Kronstadt, the fortress naval town on Kotlin Island that has served as the historic base of Russia's Baltic Fleet since the early eighteenth century. It most plausibly corresponds to the city's Russian Navy Day celebrations, though independent verification of a separately branded Sea Festival by this exact name was not confirmed in this session.
Peter the Great founded Kronstadt in 1703, a year after Saint Petersburg itself, choosing Kotlin Island in the Gulf of Finland specifically because it commanded the sea approach to his new capital and could be fortified to keep enemy fleets out of the Neva estuary entirely.