Italian Art Society
ArtNet
Sotheby's - also has app (set up free account)
Christie's - also has app (set up free account)
Dorotheum - also has app (set up free account)
Robert Simon Fine Art New York
Piacenti Art London
Whitfield Fine Art London
Moretti Fine Art London - Florence - NY
Colnaghi UK
Galerie Mendes Paris
National Gallery of Art London
National Gallery of Art London - research
National Gallery of Art DC
Galleria degli Uffizi Florence
Accademia Florence
Metropolitan Museum of Art NYC
Vatican Museums Rome
Accademia Museum Venice
Brera Museum Milan
Santa Maria della Scala Museum Siena
Borghese Gallery Rome
One Bear Place #97148Waco, TX 76798-7148