Orange, Vaucluse in the context of "Triumphal Arch of Orange"

A triumphal arch is a free-standing monumental structure in the shape of an archway with one or more arched passageways, often designed to span a road, and usually standing alone, unconnected to other buildings. In its simplest form, a triumphal arch consists of two massive piers connected by an arch, typically crowned with a flat entablature or attic on which a statue might be mounted or which bears commemorative inscriptions. The main structure is often decorated with carvings, sculpted reliefs, and dedications. More elaborate triumphal arches may have multiple archways, or in a tetrapylon, passages leading in four directions.

Triumphal arches are one of the most influential and distinctive types of ancient Roman architecture. Effectively invented by the Romans, and using their skill in making arches and vaults, the Roman triumphal arch was used to commemorate victorious generals or significant public events such as the founding of new colonies, the construction of a road or bridge, the death of a member of the imperial family or the accession of a new emperor.

The Second Council of Orange (or Second Synod of Orange) was held in 529 at Orange (civitas Arausicae), which was then part of the Ostrogothic Kingdom. It affirmed much of the theology of Augustine of Hippo and synergism, and made numerous proclamations against what later would come to be known as semi-Pelagian doctrine.

Prince of Orange (or Princess of Orange if the holder is female) is a title associated with the sovereign Principality of Orange, in what is now southern France and subsequently held by the stadtholders of, and then the heirs apparent of, the Netherlands.

The title "Prince of Orange" was created in 1163 by Holy Roman Emperor Frederick Barbarossa, by elevating the county of Orange to a principality, in order to bolster his support in that area in his conflict with the Papacy. The title and land passed to the French noble houses of Baux, in 1173, and of Chalons, in 1393, before arriving with René of Nassau in 1530. The principality then passed to René's cousin, the German-born nobleman from then Spanish Netherlands, William (known as "the Silent"), in 1544. Subsequently, William led a successful Dutch revolt against Spain; however, with independence, the new country became a decentralized republic rather than a unitary monarchy.

The Battle of Arausio took place on 6 October 105 BC, at a site between the town of Arausio, now Orange, Vaucluse, and the Rhône river, where two Roman armies, commanded by proconsul Quintus Servilius Caepio and consul Gnaeus Mallius Maximus, were heavily defeated after clashing with the migratory tribes of the Cimbri under Boiorix and the Teutons under Teutobod.

Differences between the Roman commanders prevented regular coordination between their armies, resulting in annihilation by the united Cimbrian-Teutonic force. Roman losses are thought to have been up to 80,000 legionaries in addition to 40,000 auxiliary troops. Total losses numbered up to 120,000 soldiers, the entirety of both armies. In terms of losses, this battle is regarded as the worst defeat in the history of ancient Rome, surpassing the Battle of Cannae. As a direct result of the catastrophe, the Roman military was restructured under Gaius Marius via putative reforms to the organisation and recruitment of Roman legions, which would remain principally intact for centuries thereafter. Some historians contest the existence of sudden reforms under Marius.

The Principality of Orange (French: Principauté d'Orange) was, from 1163 to 1713, a feudal state in Provence, in the south of modern-day France, on the east bank of the river Rhone, north of the city of Avignon, and surrounded by the independent papal state of Comtat Venaissin.

It was constituted in 1163, when Holy Roman Emperor Frederick I elevated the Burgundian County of Orange (consisting of the city of Orange and the land surrounding it) to a sovereign principality within the Empire. The principality became part of the scattered holdings of the house of Orange-Nassau from the time that William the Silent inherited the title of Prince of Orange from his cousin in 1544, until it was finally ceded to France in 1713 under the Treaty of Utrecht. Although permanently lost by the Nassaus then, this fief gave its name to the extant Royal House of the Netherlands. The area of the principality was approximately 12 miles (19 km) long by 9 miles (14 km) wide, or 108 square miles (280 km).