Piero della Francesca. Baptism of Christ. 1440 - 1460. National Gallery, London,
Piero Della Francesca
Piero Della Francesca’s Brera Madonna, detail of the niche. Executed in 1472-1474. Pinacoteca di Brera of Milan. / The shell was a symbol of the new Venus, Mary, and the egg is generally considered a symbol of the Creation.
Bianca Maria Visconti, the heiress of Milan head/hair bound with oval top, (Flat or a bun shape? Is it fabric or her hair?)