This is the current lighthouse, which was built near the walls of Fort Kronshlot. Built by Peter the Great in 1704, Fort Kronshlot is the oldest of the many fortresses protecting Kronstadt and St. Petersburg. The range guides ships up the channel on the south side of Ostrov Kotlin toward the naval base at Kronstadt. Located on a small island just west of the naval base, near the east end of Ostrov Kotlin. This is an active lighthouse of 82 feet - a round red cast iron tower with a lantern and a gallery.
I didn't see this range marker lined up with the range, but I saw the range marker structure on one side of it as we rounded Fort Kronshlot. According to the internet, this was build in 1891 and has been inactive since the early 1920s when the current Fort Kronshlot Light was built. It is a 52 ft round cast iron tower with lantern and gallery, painted red, built just outside the walls of Fort Kronshlot (formerly Fort Nikolai). It is located 200 yd west of the Fort Kronshlot Light on a small island just west of the naval base, near the east end of Ostrov Kotlin. The civilian port of Lomonosov on the mainland is 2 mi to the south. I have quite a few pictures of this and the current light as we passed quite close to Fort Kronshlot.