Ivangorod Fortress is a castle in Ivangorod, Leningrad Oblast, Russia. It was built in the 15th century. It is located on the east bank of the Narva River, which currently forms the international border between Russia and Estonia, across from the city of Narva in Estonia.
Ivangorod Fortress was established during the reign of Ivan III in 1492, intended to reaffirm Muscovy's access to the Baltic Sea and to form a bulwark against the Teutonic Order, being built opposite the powerful Teutonic Hermann Castle. The fortress eventually grew into the town of Ivangorod, and the structures of the fort were gradually expanded and strengthened.
Wikipedia https://en.wikipedia.org/wiki/Ivangorod_Fortress
Address Ивангород 188490, Russia
Coordinates 59°22'28.839" N 28°12'26.804" E