This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
. Google Art Project. Mosaic smalt stone brick marble lime cm Institution Tretyakov Gallery object history credit line accession number JgGMvrWjLhqQ PDold Mosaics of Saint Demetrius in art thcentury mosaics History of St Michael's GoldenDomed Monastery in Kiev Google Art Project works in The State Tretyakov