She escaped to the castle of Canossa, where the great count of Tuscany espoused her cause, and appealed in her behalf to Otto the Saxon.
She was the last heiress of the great house of Canossa, whose fiefs stretched from Mantua across Lombardy, passed the Apennines, included the Tuscan plains, and embraced a portion of the duchy of Spoleto.
It was in her castle of Canossa that Henry IV.
(elected in 1024) appointed Boniface of Canossa marquis of Tuscany, a territory then extending from the Po to the borders of the Roman state.
The important events during the earlier part of the reign of the emperor Henry IV., including the visit to Canossa and the battle of Hohenburg, are vividly described.
The finest are those of the Bevilacqua,' Canossa and Pompeii families.
He died without returning to the East, and was buried at Canossa in Apulia, in II II.
The scene at Canossa, which had at the moment a merely relative importance, remained in the memories of men as a symbol which was hateful or comforting, according to the point of view from which it was considered.
Next came the strange scene at Canossa which burned itself into the memory of Europe.
Incessant war, both at home and in Italy, had deprived it of its force; it had lost moral influence by humiliations, of which the scene at Canossa was an extreme type.
After 984 we find it a fief of Tedaldo, count of Modena and Canossa, nephew of the emperor Otho I.
In Tuscany, the historic role of the cities, with the exception of Pisa, begins at a later date, largely owing to the overlordship of the powerful margraves of the house of Canossa and their successors, who here represented the emperor.
There are on the summit of the hill the remains of an old castle, and a monument erected in 1875 to Prince Bismarck, with an inscription taken from one of his speeches against the Ultramontane claims of Rome - "Nach Canossa gehen wir nicht."
The pope excommunicated the emperor and stirred up civil war against him in Saxony with such success that he brought about Henry's bitter humiliation at Canossa in the following year.
The famous quarrel between the priesthood and the Empire, which had culminated at Canossa under Gregory VII., in the apotheosis of Philip the the Lateran council under Innocent III., and again Fair and in the fall of the house of Hohenstaufen under Innocent the IV., was reopened with the king of France by Boniface Papacy.