Rupea Citadel, located in Romania, is a medieval fortress built by Transylvanian Saxons on a 120m high basalt cliff. First mentioned in a 1324 document, the fortress has a rich history dating back to Dacian and Roman times. After periods of abandonment and restoration, the fortress underwent a comprehensive renovation from 2010 to 2013, attracting over 150,000 visitors by early 2015. With its unique architecture, including multiple wards and towers, Rupea Citadel stands as a testament to the region's historical significance and cultural heritage.