Bač Fortress built
1338 CE.
Shown on the map at 45.393°, 19.222°.
Bač Fortress (Serbian: Бачка тврђава, romanized: Bačka tvrđava; Hungarian: Bácsi vár) is a medieval fortress in Vojvodina, Serbia. It is located in the town of Bač, in the Bačka region. Founded by the king Charles Robert I, the fortress was the most important Hungarian rampart against the invading Ottoman forces and today is the best preserved medieval fort in Vojvodina.
Text from the Wikipedia article Bač Fortress, licensed CC BY-SA 4.0.