Cathedral & old mosque
If you stand next to one of the sides of Seville's Cathedral, just at the main entrance of its courtyard (Patio de los Naranjos), you' ll have in front of you what was the main gate to the great mosque (11th c.). This door (Puerta del Perdón) is the only part left standing, apart from the ablution yard itself and the alminar (the famous Giralda). The Cathedral is the largest Gothic temple and World Heritage.