A Bishop in the Orthodox Christian Church is the highest spiritual office within the Universal Church. Unlike in some other Christian denominations, an Orthodox bishop cannot interfere with other dioceses that are not under his own jurisdiction. A ruling bishop or diocesan bishop is responsible for and the head of all the parishes located in his a particular geographical territory, called a diocese or archdiocese. All authority of the lower orders of clergy is derived from the bishop. No divine services may be celebrated in any Orthodox building without the authorization of the appropriate bishop.