GolubacGolubac, probably built in the 14th century, guards the entrance to the Iron Gate gorge from high cliffs overlooking the Danube. It was held, in turn, by Prince Lazar, Despot Stefan and Despot Djuradj. The fortress has seven tall towers. Despite the many times it has been the scene of battles, Golubac is still comparatively well-preserved and represents one of the finest medieval fortresses in the country.