Abbey sacred, and to take them was to commit sacrilege. Soon, Cluny began to receive bequests from around Europe – from the Holy Roman Empire to the Spanish kingdoms from southern England to Italy. It became a powerful monastic congregation that owned and operated the network of monasteries and priories, under the authority of the central abbey at Cluny. It was a highly original and successful system, The Abbots of Cluny became leaders on the international stage and the monastery of Cluny was considered the grandest, most prestigious and best-endowed monastic institution in Europe. The height of Cluniac influence was from the second half of the 10th century through the early 12th. The first nuns were admitted to the Order during the 11th century. Cluny and the Gregorian reforms The reforms introduced at Cluny were in some measure traceable to the influence of Benedict of Aniane, who had put forward his new ideas at the first great meeting of the abbots of the order held at Aachen (Aix-la-Chapelle) in 817. Berno had adopted Benedict's interpretation of the Rule previously at Baume Abbey. Cluny was not known for the severity of its discipline or its asceticism, but the abbots of Cluny supported the revival of the papacy and the reforms of Pope Gregory VII. The Cluniac establishment found itself closely identified with the Papacy. In the early 12th century, the order lost momentum under poor government. It was subsequently revitalized under Abbot Peter the Venerable (died 1156), who brought lax priories back into line and returned to stricter discipline. Cluny reached its apogee of power and influence under Peter, as its monks became bishops, legates, and cardinals throughout France and the Holy Roman Empire. But by the time Peter died, newer and more austere orders such as the Cistercians were generating the next wave of ecclesiastical reform. Outside monastic structures, the rise of English and French nationalism created a climate unfavourable to the existence of monasteries autocratically ruled by a head residing in Burgundy. The Papal Schism of 1378 to 1409 further divided loyalties: France recognizing a pope at Avignon and England one at Rome, interfered with the relations between Cluny and its dependent houses. Under the strain, some English houses, such as Lenton Priory, Nottingham, were naturalized (Lenton in 1392) and no longer regarded as alien priories, weakening the Cluniac structure. By the time of the French Revolution, revolutionary hatred