alpha-and-omega artifacts artistic christian christianity church church-building church-interior cross crosses decorated decoration faith faith-symbols furnishings furniture inside interior lectern light lighting lights microphones paint painted painting panels platform podium pulpit railing rails readiness ready sanctuary shaped smoothed symbol symbolic symbols texture textures wall wood wooden worship alfa alpha alphabet angels architecture art background beginning carving chi Christus detail door end finish god Greek historical history jesus letters monogram omega prayer religion religious rho sacral start ancient apostles basilica Byzantine cathedral ceiling christ dome evangelists gold golden icon italian Italy lamb medieval mosaic mosaics old ornate our Lady presbyterium prophet rome saint saints Santa Maria di Trastevere St Peter tiles