The structure was part of the city walls and has a pair of horseshoe arch and pointed arch on each of its facades.

It would have been built in the time of King Alfonso X, although other voices postpone the completion of the work to the reign of Alfonso XI.

It was declared a national monument on February 4, 1915 by Alfonso XIII, by means of a royal order published on the 17th of that same month in the Madrid Gazette with the signature of Saturnino Esteban Collantes, general director of Fine Arts.