 One of the earliest references to Coppo is found in the Book of Montaperti where his name is listed amongst Florentines soldiers for the war with Siena, which ended at the Battle of Montaperti on September 4, 1260.It is speculated by many historians that Coppo was taken prisoner by the Sienese where he was then held at the church of Santa Maria dei Servi.It was here in 1261 that he painted his most famous work The "Madonna del Bordone" for the order of the Servites.