The Patio de los Naranjos (Roofless inner courtyard of orange trees) of the Mosque-Cathedral of Córdoba near the Puente Romano bridge over the river Guadaiquivir, is a popular with tourists spot for visitors to Cordoba. This Great Mosque, one of the oldest structures still standing, was opened in 988 AD when Muslims ruled Al-Andalus (Muslim Iberia including most of Spain, Portugal.