Gentile da Fabriano
All frescoes in the palace, except those of the chapel, were commissioned by Ugolino III Trinci, who died in 1415. Their execution started probably in 1407. The concept of these fresco cycles probably came from Francesco Federico Frezzi, the bishop of Foligno and author of the "Quadriregio", a poem of the four kingdoms Love, Satan, the Vices, and the Virtues. Some of these frescoes were painted between 1411 and 1412 by Gentile da Fabriano, with the assistance of Jacopo Bellini. The designs were by Gentile, but their painting was almost completely done by pupils. The authorship of the frescoes was attested by Lodovico Coltellini, a scholar who saw in 1780 two receipts to Ugolino Trinci by Gentile da Fabriano for painting the halls. Some of the frescoes in the palace depicting secular subjects are attributed to Giovanni di Corraduccio