With these more striking changes went others, less revolutionary but equally necessary to complete the new ecclesiastical system. The Saxon bishops had many of them had their seats in unimportant places in their dioceses, tending to degrade the dignity almost to the level of a rural bishopric. The Norman prelates by degrees removed the sees to the chief towns, changing the names with the change of place. Dorchester was removed to Lincoln, Selsey to Chichester, Sherborne to Old Sarum, and Elmham by two removes to Norwich. The new cities were the centres of life and influence, and they were more suitable residences for barons of the king, as the Norman bishops were. The inner organization of these bishoprics was also improved. Cathedral chapters were reformed; in Rochester and Durham secular canons were replaced by monastic clergy under a more strict regime. New offices of law and administration were introduced. The country priests were brought under strict control, and earnest attempts were made to compel them to follow more closely the disciplinary requirements of the Church. The monastic system as it existed at the time of the Conquest underwent the same reformation as the more secular side of the Church organization. It was indeed regarded by the new ecclesiastical rulers as the source of the Church's strength and the centre of its life. English abbots were replaced by Norman, and the new abbots introduced a better discipline and improvement in the ritual. The rule was more strictly enforced. Worship, labour, and study became the constant occupations of the monks. Speedily the institution won a new influence in the life of the nation. The number of monks grew rapidly; new monasteries were everywhere established, of which the best remembered, the Conqueror's abbey of Battle, with the high altar of its church standing where Harold's standard had stood in the memorable fight, is only an example. Many of these new foundations were daughter-houses of great French monasteries, and it is a significant fact that by the end of the reign of William's son Henry, Cluny, the source of this monastic reformation for the world, had sent seventeen colonies into England. Wealth poured into these establishments from the gifts of king and barons and common men alike. Their buildings grew in number and in magnificence, and the poor and suffering of the realm received their share in the new order of things, through a wider and better organized charity.