If you like live theater performances, book yourself some seats for a play or other stage show at Baltic Fleet Drama Theater. Look online for times and prices.
This arts and culture attraction in Kronshtadt is popular with travelers, so put it on your travel itinerary. Don't think the sightseeing ends there, however. There are loads more spots ready for you to check out after Baltic Fleet Drama Theater. Kronstadt Fortress, Petrovsky Park, and Kronstadt Lighthouse are close by.