Fort San Carlos, Military fort museum in Portopí, Spain
Fort San Carlos is a rectangular fortress at the western edge of Palma harbor, featuring four large bastions and thick stone walls. The structure follows classic defensive design principles and now houses a museum with historical exhibitions inside.
King Felipe III ordered construction between 1610 and 1612 to defend the bay against rising pirate threats in the Mediterranean. The fortress was strategically placed to control the harbor entrance and protect merchant vessels.
The name honors Saint Charles Borromaeus, invoked for protection against plague and disease. Visitors today can observe how soldiers and officers lived within its walls, gaining insight into daily life in a harbor fortress.
The fort sits at the southern end of Palma harbor and is best reached on foot or by public transport, as road access is limited. Visitors should wear comfortable shoes since exploring the bastions and stairs involves outdoor walking.
Inside the fort is a Military Museum displaying a notable collection of stone projectiles from the Kingdom of Mallorca period. These spherical stones are remnants of siege warfare technology from centuries past.
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