is a castle in the mountains of Italy where Pope Gregory VII forced Emperor Henry IV to walk barefoot in the snow as penance for defying in 1077. Its name denotes a high-water-mark of papal authority.
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is a castle in the mountains of Italy where Pope Gregory VII forced Emperor Henry IV to walk barefoot in the snow as penance for defying in 1077. Its name denotes a high-water-mark of papal authority.
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