The Kronverk, is a ground fortification for the Sts. Peter and Paul Fortress in Saint Petersburg, in which country?
Peter and Paul Fortress The Peter and Paul Fortress is the original citadel of St. Petersburg, Russia, founded by Peter the Great in 1703 and built to Domenico Trezzini's designs from 1706 to 1740. In the early 1920s, it was still used as a prison and execution ground by the Bolshevik government.
Primorsk, Leningrad Oblast Primorsk (Russian: Примо́рск ; Finnish: "Koivisto" ; Swedish: "Björkö" ) is a coastal town in Vyborgsky District of Leningrad Oblast, Russia and is the second largest Russian port on the Baltic, after St. Petersburg. It is located on the Karelian Isthmus, 137 km west of St. Petersburg, at the northern coast of the Gulf of Finland, near Beryozovye Islands (Finnish: "Koivusaari (Koivistonsaari), Tiurinsaari ja Piisaari" ; Swedish: "Björkö" ) which are protected as a sea bird sanctuary. Population:  (2010 Census) ;  (2002 Census) ;  (1989 Census)