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In page Angels in art:

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From then on Christian art generally represented angels with wings, as in the cycle of mosaics in the Basilica di Santa Maria Maggiore (432–440).[10] Multi-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,[citation needed] 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.