structural:reformatting, structural:scholar_edition
Clergy

Western Christianity displayed a remarkable unity. This was the outcome of the Gregorian Reform that established papal supremacy over the Catholic Church, and achieved the legal separation of the Catholic clergy from laity. Clerical celibacy was reinforced through the prohibition of clerical marriage; ecclesiastical courts were granted exclusive jurisdiction over clerics, and also over matrimonial causes. Priests were ordained by bishops in accordance with the principle of apostolic succession —a claim to the uninterrupted transmission of their consecrating power from Christ's Apostles through generations of bishops. Bishops, abbots, abbesses, and other prelates might possess remarkable wealth. Some of the ecclesiastic leaders also functioned as local secular princes, such as the prince-bishops in Kingdom of Germany and the English County Palatine of Durham, and the Grand Masters of the Teutonic Knights in their Baltic Ordensstaat. Other prelates might be regents or the power behind the throne. Believers were expected to pay the tithe (one tenth of their income) to the Church. Pluralism—the practice of holding multiple Church offices (or benefices)—was not unusual. This led to non-residence, and the absent priests' deputies were often poorly educated and underpaid.