Castello di San Michele is a historic castle located in Cagliari, the capital of Sardinia, Italy. Built in the 13th century, it served as a defensive fortress and offers stunning views of the surrounding landscape. The castle features a mix of architectural styles, reflecting its long history and various renovations over the centuries. Visitors to Castello di San Michele can explore its ancient walls, towers, and the remnants of its original structures. The site is a popular tourist attraction, providing insight into the region's medieval past and the strategic importance of Cagliari during various historical periods.