ART & ARCHITECTURE.
Rhetoric, arithmetic, astronomy, scenes from the Liberal Arts, 1411-1412, by Gentile da Fabriano (ca 1370- 1427), fresco, Hall of the Liberal Arts and of the Planets, Trinci palace, Foligno, Umbria. Detail. Italy, 15th century. Full credit: De Agostini / A. Dagli Orti / Granger, NYC -- All Rights Reserved.