Lutsk Castle, also locally known as Lubart's Castle or Upper Castle, began its life in the mid-14th century as the fortified seat of Gediminas' son Liubartas, the last ruler of united Galicia-Volhynia. It is the most prominent landmark of Lutsk, Ukraine and as such appears on the 200 hryvnia bill.
The Kievan town of Luchesk had a wooden wall as early as 1075, when Boleslaus the Bold laid siege to it for six months. Yury Dolgoruky failed to take Lutsk after a six-weeks siege in 1149. In 1255, the walls of Lutsk were stormed by Khan Jochi's grandson Kuremsa.
Wikipedia https://en.wikipedia.org/wiki/Lubart's_Castle
Coordinates 50°44'19.543" N 25°19'20.992" E