Canossa (Reggiano: Canòsa) is a comune and castle town in the Province of Reggio Emilia, Emilia-Romagna, northern Italy. It is where Holy Roman Emperor Henry IV did penance in 1077 and stood three days bare-headed in the snow to reverse his excommunication by Pope Gregory VII. The Walk to Canossa is sometimes used as a symbol of the changing relationship between the medieval Church and State.
As of December 2014, Canossa has a population of 3,778, and borders the comuni of Casina, Castelnovo ne' Monti, Neviano degli Arduini (PR), San Polo d'Enza, Traversetolo (PR), Vetto, and Vezzano sul Crostolo.