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:
Piero della Francesca Ritratti dei Duchi di Urbino Federico da Montefeltro Battista Sforza Google Art Project. Artwork Creator Piero della Francesca Tempera panel cm Institution Uffizi Lippi object history credit line accession number gwEjSUHaNNA PDold Google Art Project works in Uffizi Gallery Double portrait of the Dukes