Torre dello Ziro, Medieval watchtower in Pontone, Scala, Italy

Torre dello Ziro is a cylindrical stone tower standing on a hilltop above Amalfi and Atrani, overlooking the Mediterranean Sea. The structure was built from massive stone blocks and forms a solitary presence on this isolated height.

The tower's dating is uncertain: scholars do not rule out that it is a reconstruction of the earlier Turris de Sancto Felice, cited in a document of 1151. It was restored or altered in 1292, 1305 and 1335, and Antonio Piccolomini, Duke of Amalfi, ordered another intervention in 1480. By the early 18th century it was still serviceable and armed with cannons, but it was soon abandoned; conservation work followed in 2006.

The tower appears in the coat of arms of the Pontone district, and its name is tied to the imprisonment of Giovanna d'Aragona, called "la Pazza", Duchess of Amalfi, held there with her three children in the early 16th century. Her story, passed down locally, later reached European literature.

The tower stands on a limestone rise in Pontone, a hamlet of Scala, above the road linking Amalfi and Atrani. It is reached on foot along paths from Pontone or Scala; the climb is steep and exposed, so carry water and wear walking shoes. The ground floor is divided into two spaces, and the old entrance was on the first floor, about 4.65 m up, reached by rope or a retractable wooden ladder.

The tower appears on the coat of arms of the Pontone frazione. Its lower floor held a large cistern for rainwater; a smaller space was used to hold prisoners lowered through a trapdoor from the first floor into the "fossa". The original entrance was on the first floor, about 4.65 m above ground, reached by ropes or a retractable wooden ladder.