It is thought that Verrocchio began painting in the 1460s, when he worked at Prato with the painter Fra Filippo Lippi. There is only one known painting that was signed by Verrocchio. This is an altarpiece of the "Madonna and Child with Saints" in the Cathedral of Pistoia, painted in the late 1470s. There are several more paintings from Verrocchio's studio. They have probably been painted partly by Verrocchio and partly by his students. 