Torre del Infantado, Medieval fortified tower in Potes, Spain.

The Torre del Infantado is a fortified tower in Potes featuring four levels of stone walls, corner towers, crenellations, and a central courtyard that lights the interior spaces. The structure spans multiple floors and now houses exhibition spaces where visitors can explore medieval history and architecture.

The tower was built in the 14th century, probably on the site of an earlier structure owned by the de la Lama family, and belonged to Tello, lord of Liébana and half-brother of Henry II. It burned in 1444 during disputes over the lordship and was rebuilt. From the 16th century it was the seat of the Marquis of Santillana and the Dukes of Infantado; it later served as a prison, and in 1823 constitutionalist troops held it for a day against royalist siege.

The permanent exhibitions, open since March 2011, present the life and work of the 8th-century abbot Beato de Liébana and the Beatus tradition: facsimiles of Apocalypse codices and a reproduction of a monastic scriptorium. Visitors can also climb to the crenellated viewpoint over Potes and the Liébana valley.

Access to the tower is through the center of Potes, a small town easily explored on foot. Visitors should wear sturdy shoes, as the interior staircases are steep and the floors are made of stone.

The central courtyard, added in a 16th-century remodelling by the Dukes of Infantado, is unusual among Cantabrian fortresses. The tower also served for centuries as a prison; around 1595 its wooden interior had to be rebuilt because inmates had taken parts of it to burn for warmth.