Austrasia
511–751
Austrasia, homeland of the Franks (darkest green), and their subsequent conquests (other shades of green)
Capital	Reims, Metz
Common languages	Old Frankish, Vulgar Latin (Gallo-Roman), Latin
Religion	Christianity
Government	Monarchy
King
Historical era	Early Middle Ages
• Established	511
• Disestablished	751
Preceded by Succeeded by Roman Gaul Germania inferior Carolingian Empire

Austrasia was the northeastern kingdom within the core of the Frankish Empire during the Early Middle Ages, centring on the Meuse, Middle Rhine and the Moselle rivers. It included the original Frankish-ruled territories within what had been the northernmost part of Roman Gaul, and cities such as Cologne, Trier and Metz. It also stretched beyond the old Roman borders on the Rhine into Frankish areas which had never been formally under Roman rule. It came into being as a part of the Frankish Empire founded by Clovis I (481–511). At the same time, the initial powerbase of Clovis himself was the more Romanized part of northern Gaul, lying southwest of Austrasia, which came to be known as Neustria.

These two sub-kingdoms, along with several others, were subsequently ruled by the descendants of Clovis, the Merovingian dynasty, followed in the 8th and 9th centuries by their successors the Carolingian dynasty, whose own powerbase was in Austrasia itself. The two Frankish dynasties did not always have a single ruler ruling the whole Frankish empire. They also often allowed different family members to rule sub-kingdoms, and these were sometimes even in conflict with each other despite the underlying continuity of the overall Frankish empire. Already by 561, Austrasia was ruled as a separate kingdom within the Frankish realm by the Merovingian king Sigebert I (561–575).

The last emperor to hold the entire Frankish empire including Austrasia was Louis the Pious. For several generations his descendants negotiated different ways of dividing the empire. In 880, the Treaty of Ribemont was the last such major agreement, which established formal boundaries eastern, central, and western sub-kingdoms that remained important throughout the Middle Ages. West Francia, which contained Neustria, was the basis of the later medieval Kingdom of France. Lotharingia, which corresponded to Austrasia, was folded into the larger kingdom of East Francia. These became the core of the Holy Roman Empire, which also had claims over the kingdoms of Burgundy, and Italy.

The name Austrasia is not well attested in the Merovingian period. The first surviving record of the term is by Gregory of Tours, writing in about 580. It was later used by Aimoin of Fleury around 1000. It is presumably the latinization of an Old Frankish name, reconstructed as *Oster-rike ("Eastern Kingdom").^[1] As with the name Austria, it contains the word for "east", and means "eastern land". The term designated the original territory of the Franks in contrast to Neustria, which apparently meant the "(new) western land".

Austrasia was centered on the Middle Rhine, including the basins of the Moselle, Main and Meuse rivers. It bordered on Frisia and Saxony to the north, Thuringia to the east, Swabia and Burgundy to the south and to Neustria to the southwest. The exact boundary between Merovingian Neustria and Austrasia is unclear with respect to areas such as the medieval counties of Flanders, Brabant and Hainaut, and areas immediately to the south of these.

Metz served as the Austrasian capital, although some Austrasian kings ruled from Reims, Trier and Cologne. Other important cities included Verdun, Worms and Speyer. Fulda monastery, an important royal monastery, was founded in eastern Austrasia in the final decade of the Merovingian period.

In the High Middle Ages, its territory became divided among the duchies of Lotharingia and Franconia in Germany, with some western portions including Reims and Rethel passing to France.

Its exact boundaries were somewhat fluid over the history of the Frankish sub-kingdoms, but Austrasia can be taken to correspond roughly to the territory of present-day Luxembourg, parts of eastern Belgium, north-eastern France (Lorraine and Champagne-Ardenne), west-central Germany (the Rhineland, Hesse and Franconia) and the southern Netherlands (Limburg, North Brabant, with a salient north of the Rhine including Utrecht and parts of Gelderland).

After the death of the Frankish king Clovis I in 511, his four sons partitioned his kingdom amongst themselves, with Theuderic I receiving the lands that were to become Austrasia. Descended from Theuderic, a line of kings ruled Austrasia until 555, when it was united with the other Frankish kingdoms of Chlothar I, who inherited all the Frankish realms by 558. He redivided the Frankish territory amongst his four sons, but the four kingdoms coalesced into three on the death of Charibert I in 567: Austrasia under Sigebert I, Neustria under Chilperic I, and Burgundy under Guntram. These three kingdoms defined the political division of Francia until the rise of the Carolingians and even thereafter.

From 567 to the death of Sigebert II in 613, Neustria and Austrasia fought each other almost constantly, with Burgundy playing the peacemaker between them. These struggles reached their climax in the wars between Brunhilda and Fredegund, queens, respectively, of Austrasia and Neustria. Finally, in 613, a rebellion by the nobility against Brunhilda saw her betrayed and handed over to her nephew and foe in Neustria, Chlothar II. Chlothar then took control of the other two kingdoms and set up a united Frankish kingdom with its capital in Paris. During this period the first majores domus or mayors of the palace appeared. These officials acted as mediators between the king and the people in each realm. The first Austrasian mayors came from the Pippinid family, which experienced a slow but steady ascent until it eventually displaced the Merovingians on the throne.

In 623, the Austrasians asked Chlothar II for a king of their own and he appointed his son Dagobert I to rule over them with Pepin of Landen as regent. Dagobert's government in Austrasia was widely admired. In 629, he inherited Neustria and Burgundy. Austrasia was again neglected until, in 633, the people demanded the king's son as their own king again. Dagobert complied and sent his elder son Sigebert III to Austrasia. Historians often categorise Sigebert as the first roi fainéant, or do-nothing king, of the Merovingian dynasty. His court was dominated by the mayors. In 657, the mayor Grimoald the Elder succeeded in putting his son Childebert the Adopted on the throne, where he remained until 662. Thereafter, Austrasia was predominantly the kingdom of the Arnulfing mayors of the palace and their base of power. With the Battle of Tertry in 687, Pepin of Heristal defeated the Neustrian king Theuderic III and established his mayoralty over all the Frankish kingdoms. This was even regarded by contemporaries as the beginning of his "reign". It also signalled the dominance of Austrasia over Neustria, which would last until the end of the Merovingian era.

In 718, Charles Martel had Austrasian support in his war against Neustria for control of all the Francian realms. He was not king himself, but appointed Chlothar IV to rule in Austrasia. In 719, Francia was united by Martel's family, the Carolingian dynasty, under Austrasian hegemony. While the Frankish kings continued to divide up the Frankish realm in different ways over subsequent generations, the term Austrasia was only used occasionally after the Carolingian dynasty.

• Francia
• East Francia
• Duchy of Franconia
• Benelux
• Continental Europe

• Charles Oman. The Dark Ages 476–918. London: Rivingtons, 1914.
• Thomas Hodgkin. Italy and Her Invaders. Oxford: Clarendon Press, 1895.