The church is a masterpiece of Abruzzese Romanesque and Gothic architecture and one of the chief sights of L'Aquila. The striking jewel-box effect of the exterior is due to a pattern of blocks of alternating pink and white stone; the interior, on the other hand, is massive and austere. Outbuildings include a colonnaded cloister, with the central fountain typical of many other similar Italian cloisters, and the former monastic refectory. Parts of the structure were significantly damaged in the 2009 earthquake in l'Aquila.