At the southern end of the Roman Bridge of Calahorra Tower of Cordoba a watchtower built on an Islamic rises. Billed build by Henry II of Castile during the war against his brother Pedro I the Cruel, its strategic location as an entry point to the city conferred great importance in military history. Polygonal and few openings, the two main towers are joined by arch leading into the enclosure. In the early twentieth century was declared a historic monument. Today, after several uses, such as jail and school, the museum welcomes Roger Garaudy on coexistence between the Jewish, Christian and Muslim cultures.