By the eleventh century, the Church found itself in great need of reform, especially the clergy, and the Holy Spirit provided a series of reform-minded popes. These popes began their ecclesial careers as monks, and many of them had spent time at the famous reformed Benedictine monastery at Cluny in France. When Bruno of Alsace was elected pope in 1049, taking the name Leo IX, he initiated one of the most comprehensive reforms in Church history.

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