It is not at first sight easy to explain the ever-growing appeal which Cluny had during the tenth and eleventh centuries for clergy and still more for laymen, particularly in Burgundy, France, Christian Spain and North Italy. The basis of Cluniac life was the choir service of the monks and the silence and ordered round of the cloister. By and large the Cluniacs did not seek to work outside the cloister or to become involved in wider pastoral care. They were, indeed, concerned for the Church and for the world at large, but with a view to winning individuals to share spiritually and to support materially the other-worldly ends of the monastic order. Yet, especially under abbots Odilo and Hugh, there was a rapid rise in the number of houses subject to Cluny or otherwise influenced by it; a Cluniac house formed part of the neighbourhood of a large part of the people who lived to the south and west of Lorraine. Cluny itself was well situated to attract travellers, and its dependencies were especially important on the pilgrimage routes. Together with the increasing number of Cluniac houses the long series of charters which record its endowment with monasteries, churches, lands and other wealth testify to its impact upon Church and Society in western Europe.