The medieval fortress of Turnu (English: tower, Turkish: Kule, also known as Nicopolis minor, Holavnic) is located in the southern part of Turnu Măgurele at a distance of 3 km from the city and 1 km from the confluence of the Olt and Danube rivers in today's Romania. The fortress is documented during the reign of Mircea the Elder (1394) and was built on the Danube line for the defense of Wallachia against the Turkish peril. At the end of the reign of Mircea the Elder, under unclear circumstances, it came under Ottoman occupation to return to the possession of Wallachia only in 1829 when it was burned and demolished.