Cluny Abbey is a historic Benedictine monastery located in Cluny, France. Founded in 910 AD by Duke William I of Aquitaine, it became a center of monastic reform and played a significant role in the development of the Benedictine Order. At its height, Cluny Abbey was the largest church in the world and had numerous daughter houses across Europe. The abbey is known for its architectural innovations, particularly the Romanesque style, which influenced many other churches. Cluny Abbey was also a hub of learning and spirituality, attracting monks and scholars. However, it declined in the late Middle Ages and was eventually dissolved during the French Revolution.