The Old Grodno Castle in Grodno, Belarus, originated in the 11th century as the seat of a dynasty of Black Ruthenian rulers, descended from a younger son of Yaroslav the Wise of Kiev.
Wikipedia https://en.wikipedia.org/wiki/Old_Grodno_Castle
Official Website https://museum-grodno.by/
Coordinates 53°40'38.696" N 23°49'23.957" E
