It was built by Azzo Adalbert, but by the 1070s it had come into the possession of Countess Matilda of Tuscany.
It was built by Azzo Adalbert, but by the 1070s it had come into the possession of Countess Matilda of Tuscany. She was the one who invited a German emperor to visit there in an event described by Lambert of Hersfeld, who claimed that he stood outside this castle in the snow for three days before being granted absolution on January 28. FTP, identify this castle in northern Italy, where Henry IV was humiliated by Gregory VII, whose name has become a byword for penance.
It was built by Azzo Adalbert, but by the 1070s it had come into the possession of Countess Matilda of Tuscany.
Canossa