Saint Augustine Altarpiece (Piero della Francesca)

The Saint Augustine Altarpiece was a mixed-technique 1454-1469 panel painting by Piero della Francesca, now split up and dispersed. It had at least ten panels, not including a probable predella (now completely lost) or other panels (also completely lost). Eight panels survive.
History.
It is the artist's third known major altarpiece, following his "Polyptych of the Misericordia" (c.1444-1464) and "Polyptych of Perugia" (c.1460-1470). It was intended for the church of Sant'Agostino (now rededicated as Santa Chiara) in Sansepolcro. The Augustinians there signed a contract with the artist on 4 October 1454, with Angelo di Giovanni di Simone d'Angelo's signature and that of the artist. He received the last payment on 14 November 1469.
The Augustinians probably took the incomplete work with them when they moved out of the church. It was then completed in its new location before being broken into pieces, possibly during the 16th century. In the first half of the 19th century the main panels of the work were in Milan, as shown by wax stamps on their reverses authorising their export from Austrian Lombardy and also the seals of a number of collectors from Milan. Towards the end of the 19th century the panels appeared as separate lots at an art dealership, leading them to be split between a number of mainly private collections, which later passed to their present public collections or institutions.
Main register.
To the right of "St Michael" and to the left of "St John" can be seen traces of the throne from the lost central panel, "Madonna and Child".
Upper register.
Between "Monica" and "Crucifixion" was another saint, now lost.