The Archdiocese of Reims is a Latin Church ecclesiastic territory or archdiocese of the Catholic Church in France. Erected as a diocese around 250 by St. Sixtus of Reims, the diocese was elevated to an archdiocese around 750. The archbishop received the title "primate of Gallia Belgica" in 1089.

A prince-bishop is a bishop who is also the civil ruler of some secular principality and sovereignty, as opposed to Prince of the Church itself, a title associated with cardinals. Since 1951, the sole extant prince-bishop has been the Bishop of Urgell, Catalonia, who has remained ex officio one of two co-princes of Andorra, along with the French president.