The Torre de la Calahorra was built in the 14th Century to defend the bridge spanning the River Guadalquivir. The tower now houses a museum that traces the culture and philosophy of Islamic Cordoba through displays and commentary. There are models of Mezquita and Granada`s Alhambra. The museum focuses on the different cultures of Cordoba`s past. It is located at the southern end of the Puento Romano, an arched bridge built on Roman foundations.