Also called Torre de Santo Tomás. It was built in the Almohad period, in the 13th century, as part of the canvas of the wall that linked the Alcázar with the Torre del Oro. It has a hexagonal floor plan and is about 15 meters high, being solid in the first 8 meters.
It is built with brick, reinforced with ashlars at the base and at the corners. In its upper half, it is crossed by the two horizontal stripes so characteristic of the Almohad towers. Each wall is decorated at the top with polylobed blind arches framed by alfices.