Consecrated in 1123, one day before Santa Maria. In the southeast corner of the building is a slender six-storey tower built in the Lombard Romanesque style, its interior decorated with frescoes from the same period. In the apse is a copy of the famous Christ Pantocrator by the Master of Taüll. A projection beamed onto the walls of the central apse brings the original 12C frescoes to life, allowing visitors to appreciate the technical artistry and the meaning of the iconography.