It is believed that the name Canose comes from Canossa, the castle town in Emilia-Romagna, famous as the site where Holy Roman Emperor Henry IV did penance in 1077, standing three days bare-headed in the snow, in order to reverse his excommunication by Pope Gregory VII. There is also a town in Southern Italy, Canosa di Puglia, between Bari and Foggia, located in the province of Barletta-Andria-Trani, not far from the position on the Ofanto River where the Romans found refuge after the defeat of the Battle of Cannae.