The structure is an imitation of the medieval Muslim baths. Its existence has been documented since the 12th century. The baths occupy a rectangular space, and behind the entrance door is the apoditerium room, where there is an octagonal pool. A small room gives access to the frigidarium, or cold room, followed by the tepidarium, or warm room, and in a worse state of preservation is the caldarium, used for hot steam baths. The building is located inside the convent of the Capuchin nuns.