The Arches Court, presided over by the Dean of Arches, is an ecclesiastical court of the Church of England covering the Province of Canterbury. Its equivalent in the Province of York is the Chancery Court. It takes its name from the street-level arched windows of the old crypt of St Mary-le-Bow (Sancta Maria de Arcubus) where the court still sits. Provincial Court The Court of Arches is the provincial Court of Appeal for Canterbury. It has both appellate and original jurisdiction. It is presided over by the Dean of the Arches, who is styled The Right Honourable and Right Worshipful the Official Principal and Dean of the Arches. The dean must be a barrister of ten years' High Court standing or the holder or former holder of high judicial office. The appointment is made by the two archbishops jointly. At various times the court has sat in the church of St Mary-le-Bow (Sancta Maria de arcubus, formerly the archbishop's principal peculier in London), whose arches give the court its name. The court used to sit in a large room over the north aisle of the 11th-century crypt adjoining Bow Lane. The room was later rebuilt on an even larger scale, and eventually came to be used as the vestry. After the Great Fire it was held in Doctors' Commons and also at 1 The Sanctuary, Westminster and St Paul's Cathedral. Its permanent home remains St Mary le Bow, where regular sittings include those to confirm the election of each new diocesan bishop in the province. The Provincial Registry is at 16 Beaumont Street, Oxford OX1 2LZ. The proper jurisdiction of the court is over only the 13 peculiar parishes belonging to the archbishop in London. But, as the office of Dean of the Arches is united with that of Principal Official, the dean receives and determines appeals from the sentences of all lesser ecclesiastical courts within the province. Many original suits are also heard, where lesser courts waive jurisdiction by letters of request. Appeal lies with the Privy Council, except on matters of doctrine, ritual or ceremony, which go to the Court for Ecclesiastical Causes Reserved. There may also be a Deputy Dean. The court normally consists of the dean, two clerks appointed by the prolocutor of the lower house of the appropriate convocation and two lay people appointed by the Chairman of the House of Laity in consultation with