Torre di San Giovanni di Posada, Coastal defensive tower in Posada, Italy.

The Torre di San Giovanni is a cylindrical tower with a conical base constructed from granite blocks along the Posada coastline. The structure rises approximately 10 meters and features an entrance positioned several meters above ground level, emphasizing its defensive design.

The Aragonese built the tower before 1591 to guard an ancient port that has since disappeared. It was already abandoned by 1720, restored in 1778, and abandoned again at the end of the century. During the French expedition to Sardinia in 1793, it was repaired and garrisoned by lookout troops before being definitively abandoned.

The tower's name comes from the marine hamlet of San Giovanni, a frazione of Posada. Each summer, concerts and performances are held near the tower, with artists from across Italy, including trumpeter Paolo Fresu, who was born in this area, Uri Caine and Ludovico Einaudi.

The exterior of the tower is accessible to visitors year-round, though the interior is currently closed due to structural conditions. Visit during clear weather to fully enjoy the coastal location and examine the architecture from the outside.

The elevated door opening was not an architectural accident but an intentional security measure that prevented attackers from entering. This practical defensive strategy helped occupants protect the structure against surprise raids.