Sarum

SARUM, THE USE OF. In the early Church in England every Bishop was allowed to ordain rites and ceremonies, and prayers for use in his own diocese. The exercise of this power, in process of time, caused a considerable variety in the manner of performing Divine Service; and the custom of a diocese in its ceremonial, mode of chanting, &c., became a distinct Use, and was known by the name of that diocese. Thus gradually the Uses, or customs, of York, Sarum (or Salisbury), Hereford, Exeter, Lincoln, Bangor, and doubtless others of which the records have perished, were recognised as defined and established varieties of the Ritual of the English Church.

The most remarkable of these was the Use of Sarum. It was drawn up about 1085 by Osmund, Bishop of Salisbury and Chancellor of England. He re-built his cathedral, collected together clergy distinguished for learning, and skill in chanting, and took much pains to regulate the ecclesiastical offices; so that his church became a model for others, and his "Custom-book" was wholly or partially followed in various parts of the kingdom, more especially in the South of England.

We may look upon this Use  as being the foundation of our present
Prayer Book.