Filippino Lippi.

Freskenzyklus der Brancacci-Kapelle in Santa Maria del Carmine in Florenz, Szene: Besuch des Hl. Petrus im Kerker durch den Hl. Paulus.

1481-1482, Fresko. Florenz, Santa Maria del Carmine, Cappella Brancacci. Begonnen durch Masolino und Masaccio. Italien. Renaissance.

KO 03124
Devil found in Giotto fresco: Art restorers see satanic smile in St Francis in Assisi Basilica | Mail Online

Der Teufel steckt im Detail:

Art restorers have discovered the figure of a devil hidden in the clouds of one of the most famous frescos by Giotto in the Basilica of St Francis in Assisi.
The devil was hidden in the details of clouds at the top of fresco number 20 in the cycle of the scenes in the life and death of St Francis painted by Giotto in the 13th century.
The discovery was made by Italian art historian Chiara Frugone. It shows a profile of a figure with a hooked nose, a sly smile, and dark horns hidden among the clouds in the panel of the scene depicting the death of St Francis.