910 CE
The founding of the Abbey of Cluny in Burgundy established a monastic institution that would become the most influential center of religious reform in medieval Western Europe.
Religion & Governance
- Duke William I of Aquitaine founded the Benedictine Abbey of Cluny on September 11, granting it an unusual charter that placed the monastery directly under papal protection rather than under local secular or ecclesiastical authority.
- Cluny's independence from lay control allowed it to pursue strict adherence to the Rule of Saint Benedict, and over the following two centuries it would lead a major reform movement that reshaped monasticism and the relationship between church and state across Europe.
Climate & Environment
- Atmospheric carbon dioxide concentration was approximately 276 parts per million, as later confirmed by ice core analysis.
Population & Demographics
- World population is estimated to have been approximately 282 million.