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
History of Belgium Roman Emperor, in his Pragmatic Sanction of 1549. The Eighty Years' War (1568–1648) later led to the split between a northern Dutch Republic and the Southern Netherlands from which Belgium and Luxembourg developed. This southern territory continued to be ruled by the Habsburg descendants of the Burgundian house, at first as the "Spanish Netherlands". Invasions from France under Louis XIV led to the loss of what is now Nord-Pas-de-Calais to France, while the remainder finally became the "Austrian Netherlands". The French Revolutionary wars led to Belgium becoming part of France in 1795, bringing the end of the semi-independence of areas