Ancient Diocese of Orange century: at the Synod of Arles in 314, its bishop was represented by a priest named Faustinus. The first bishop of Arausio whose name is given in extant documents was Constantius, who took part in the Council of Aquileia, 381. From the early 5th century, the see was a suffragan of the metropolitan see of Arles. Arausio hosted two important synods, in 441 and 529. The Second Council of Orange was of importance for its condemnation of what later came to be called Semipelagianism. In 1516 Francis I of France ordered the union of the principality of Orange and the
Principality of Leiningen Principality of Leiningen The Principality of Leiningen () was a short-lived principality ruled by the Prince of Leiningen. The principality emerged in 1803 in the course of secularization and was created when the princely branch of the House of Leiningen, which had been raised to the rank of a Prince of the Holy Roman Empire in 1779, was deprived of its lands on the left bank of the Rhine by France, namely at Dagsburg, Hardenburg and Durkheim, and subsequently received the secularized Amorbach Abbey as an ample compensation in 1803. A few years later, the Principality of Leiningen was mediatized