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Piero della Francesca Ritratti dei Duchi di Urbino Federico da Montefeltro Battista Sforza detail . PIERO della FRANCESCA Portraits of Federico da Montefeltro and His Wife Battista Sforza Panel cm each Galleria degli Uffizi Florence www wga hu see filename or category Museum Uffizi credit line PDold Double portrait of the Dukes