This oratory is a well-preserved 18th-century church on two levels, with an austerely white, cryptlike space in the basement and an oval-shaped, highly decorated Baroque chapel on the floor above. The artistic contents of the “Holy Cave” are evidence of the level of excellence characteristic of 18th-century Cádiz: Haydn wrote his Seven Words from the Cross (1787) to be performed here and Goya painted The Last Supper, which can still be seen in the upper chapel.