The Mosque of Christ of the Light is the only remaining mosque in Toledo of the ten which existed in the city during Moorish times. It was then known as Bab-al-Mardum. It is located near the Puerta del Sol, in an area of the city once called Medina where wealthy Muslims used to live. Dating from the late 10th century, it is a fascinating little former mosque in a park above the northern ramparts of Toledo.