Baba Vida Fortress stands as one of Bulgaria's most impressively preserved medieval castles, situated on the Danube River in Vidin in the country's northwest, 200 kilometres from Sofia. Though Roman foundations from the Bononia watchtower date to the 10th century, the fortress received its primary construction during the Second Bulgarian Empire (late 12th to 14th century) and sheltered Ivan Sratsimir, Bulgaria's last king before Ottoman dominion. According to local legend, the fortress was built by Vida, an aristocratic daughter who rejected marriage proposals to pursue independence within its walls. The structure features nine corner and intermediate towers with strategically designed loop-holes, surrounded by a moat historically filled by Danube waters and accessed via a movable bridge, creating an imposing defensive complex that has endured centuries of conflict and occupation.