From then on, though of course with some exceptions, Christian art represented angels with wings, as in the cycle of mosaics in the Basilica of Saint Mary Major (432–440).Four- and six-winged angels, often with only their face and wings showing, drawn from the higher grades of angels, especially cherubim and seraphim, are derived from Persian art, and are usually shown only in heavenly contexts, as opposed to performing tasks on earth. They often appear in the pendentives of domes or semi-domes of churches.