In his Oriens Christianus, the Dominican scholar Michel le Quien (1661-1733) did those interested in eastern Christianity a service that has yet to be surpassed in terms of scope and completeness of detail.  In these three volumes, the French historian supplies information on the dioceses and bishops of the provinces under the patriarchates of Constantinople, Alexandria, Antioch, and Jerusalem.  In addition, the last volume deals with the Maronites and their history.  Full indices conclude each volume.  This work is an essential resource for those interested in the churches of the Middle East and Africa.