Debbie mentioned Piero della Francesca so I thought I'd remark on the beauty of his Legends of the True Cross frescoes in the Basilica di San Francesco, which we saw 2 1/2 years ago in Arezzo: http://www.thetravelzine.com/italy0301_4.htm

Also see WebMuseum, Paris: http://www.ibiblio.org/wm/paint/auth/piero/

Ciao, Linda Toronto