+1155 marked a pivotal year in [Medieval Europe](/wiki/Medieval_Europe), notably with the coronation of Frederick I Barbarossa, strengthening the [Holy Roman Empire](/wiki/Holy_Roman_Empire). This period saw shifting powers and the continued consolidation of monarchical influence.
+## See also
+- [Frederick Barbarossa](/wiki/Frederick_Barbarossa)
+- [Middle Ages](/wiki/Middle_Ages)
+- [Papacy](/wiki/Papacy)
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