My guidebook doesn't have much on this church but I wish I had done more research before we went. The frescoes are truly beautiful. The church's very large size gives the ceiling space to really envelop you. The infornpmation provided inside the church about the various chapels was minimal, I thought, but they were each interesting, specially the ones that seemed yet-to-be-finished. You could spend an hour in here easily. We plan to go back.