Master of the Osservanza (Sano di Pietro?) active (late 1420s - early 1440s)

• Was an Italian painter of the Sienese School.
• He was active about 1420s to 1450.
• The Italian scholar Roberto Longhi recognized that two triptychs formerly attributed to Stefano di Giovanni (il Sassetta) were the work of another hand, now generally referred to as the Master of the Osservanza Triptych.
• Research in 2010 by Maria Falcone in Siena has revealed the name of the Master to be Sano di Pietro.
• Falcone found a document about an altarpiece by the “Master of Osservanza” for a church in Asciano, just outside Siena, which was actually under the bishopric of Arezzo.
• The priest of the church in Asciano did not pay the painter and therefore the city government of Siena had to make an appeal to the bishop in Arezzo to force the priest from his district to pay the artist.
• The displayed painting is a crop from: Master of the Osservanza, Saint Anthony the Abbot in the Wilderness, 1435.
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