The architectural details of the choir developed in response to its function as the place where the Divine Office was chanted by the monastic brotherhood or the chapter of canons. The chancel was regarded as the clergy's part of the church, and any choirboys from a choir school counted as part of the clergy for this purpose. After the Reformation, when the number of clergy present even in large churches and cathedrals tended to reduce, and lay singing choirs became more frequent, there were often objections to placing them in the traditional choir stalls in the chancel. The pulpit and lectern are also usually found at the front of the choir, though both Catholic and Protestant churches have sometimes moved the pulpit to the nave for better audibility. The organ may be located here, or in a loft elsewhere in the church. Some cathedrals have a retro-choir behind the High Altar, opening eastward towards the chapels (chantries) in the eastern extremity.