On the left are a Bishop Saint and Saint Nicholas of Tolentino; on the right, Saints Bartholomew and Monica (the mother of Saint Augustine). The triptych is said to come from the Augustinian church of S. Spirito, Florence; and contains Augustinian saints. The other panels in the National Gallery's Collection by Machiavelli may also come from the same altarpiece, as may a predella panel showing 'A Miracle of Saint Nicholas of Tolentino' (now Amsterdam, Rijksmuseum).