Matilda of Tuscany (Matilde di Canossa maˈtilde di kaˈnɔssa, Matilda, Mathilda; 1046 – 24 July 1115 or Matilda of Canossa after her ancestral castle of Canossa), also referred to as la Gran Contessa ("the Great Countess"), was a member of the House of Canossa (also known as the Attonids) in the second half of the eleventh century. Matilda was one of the most important governing figures of the Italian Middle Ages. She reigned in a period of constant battles, political intrigues and Roman-Catholic excommunications, and was able to demonstrate an innate and skilled strategic leadership capacity in both military and diplomatic matters.
She ruled as a feudal margravine and, as a relative of the imperial Salian dynasty, she brokered a settlement in the so-called Investiture Controversy; in this extensive conflict with the emerging reform Papacy over the relationship between spiritual (sacerdotium) and secular (regnum) power, Pope Gregory VII dismissed and excommunicated the Holy Roman Emperor Henry IV in 1076. At the same time, Matilda came into possession of a substantial territory that included present-day Lombardy, Emilia, Romagna and Tuscany, and made the Canossa Castle, in the Apennines south of Reggio, the centre of her domains.
In January 1077, Henry IV was, after his famous penitential walk in front of the Canossa (Canusia) Castle, accepted back into the church community by the Pope. The understanding between the Emperor and the Pope was short-lived, however. In the conflicts with Henry IV that arose a little later, Matilda put all her military and material resources into the service of the Papacy from 1080. Her court became a refuge for many displaced persons during the turmoil of the investiture dispute and experienced a cultural boom. Even after Pope Gregory VII's death in 1085, Matilda remained an important pillar of the Reform Church. Between 1081 and 1098, the Canossa rule fell into a major crisis due to the grueling disputes with Henry IV. The historical record is sparse for this time.