Also called Arco de la Plata or Arco de Mañara. It is one of the entrance doors through which the walled enclosure that surrounded the Alcázar was accessed. It was built in the Almohad period, probably already in the 13th century, like the Torre del Oro. From the Islamic construction, the original horseshoe arch, framed by an alfiz, can still be seen from the Avenida de la Constitución.
However, most of what has come down to us responds to the reform undertaken in the fourteenth century, in Christian times. It was then that the Gothic rib vault that covers it today was arranged.