Confessio belgica (1561).
The other, territorially distinct from it for reasons of statecraft, was the Temple of Roma and Augustus, to which the inhabitants of the 64 Gallic cantons in the three Roman provinces of Aquitania, Lugudunensis and Belgica - the so-called Tres Galliae - sent delegates every summer to hold games and otherwise celebrate the worship of the emperor which was supposed to knit the provincials to Rome.
Under his friend Vespasian he returned to the service of the state, serving as procurator in Gallia Narbonensis (70) and Hispania Tarraconensis (73), and also visiting the Provincia Belgica (74).
The three provinces were: Aquitania, reaching from the Pyrenees almost to the Loire; Lugudunensis, the land between Loire and Seine, reaching from Brittany in the west to Lyons in the south-east; and Belgica in the north.
In 1562 the Confessio belgica was publicly acknowledged, and in 1563 the church order was arranged.
Under the Romans the district was included in the province of Belgica prima, afterwards forming part of the Frankish kingdom of Austrasia and of the empire of Charlemagne.
Under Tiberius the Helvetii were separated from Gallia Belgica and made part of Germania Superior.
Beginning with the Belgae and the Gallia Belgica of the Romans, the use of the adjective to distinguish the inhabitants of the south Netherlands can be traced through all stages of subsequent history.