カノッサの屈辱
Canossa (Reggiano: ) is a "comune" and castle town in the Province of Reggio Emilia, Emilia-Romagna, northern Italy. It is 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. The Walk to Canossa is sometimes used as a symbol of the changing relationship between the medieval Church and State.