Austrasia: The forgotten eastern heartland that forged the medieval Frankish power structure

History · Published 3 October 2026 Swipe more like this →

In short: Before modern borders, the Frankish realm was a shifting mosaic of sub-kingdoms. Austrasia, the northeastern territory centered on the Rhine, served as the launchpad for the Carolingian dynasty. It was a land of constant conflict, royal intrigue, and the slow rise of the mayors who eventually eclipsed their kings.

Austrasia emerged as the northeastern core of the Frankish state, spanning territories between the Meuse, Moselle, Middle Rhine, and Main rivers. While the western, more Romanized regions became known as Neustria, Austrasia represented the original Frankish-ruled lands, including areas that had never been part of Roman Gaul. The name itself, first recorded by Gregory of Tours around 580, is likely a Latinization of the Old Frankish *Oster-rike, meaning 'Eastern Kingdom.'

The political history of Austrasia was defined by its rivalry with Neustria. From 567 until 613, the two kingdoms were locked in near-constant conflict, famously epitomized by the power struggle between queens Brunhilda and Fredegund. This instability allowed the 'mayors of the palace'—officials originally intended to mediate between king and people—to gain immense influence. By the 7th century, families like the Pippinids began to dominate the Austrasian court, eventually sidelining the Merovingian monarchs entirely.

The rise of the Carolingian dynasty shifted the balance of power permanently toward the east. Following the Battle of Tertry in 687, Pepin of Heristal established Austrasian dominance over the entire Frankish realm. By 719, Charles Martel had unified the kingdoms under Austrasian hegemony. As the Carolingian Empire matured, the region’s identity fractured; the 843 Treaty of Verdun split Austrasia, with eastern portions evolving into Franconia and western areas eventually becoming known as Lotharingia, named for king Lothair II.

Today, the territory of Austrasia roughly corresponds to parts of modern-day Luxembourg, eastern Belgium, northeastern France, the southern Netherlands, and west-central Germany. Though its boundaries were fluid throughout the Early Middle Ages, its legacy as a 'stem land' of the Carolingian Empire remains a critical chapter in the formation of European political geography. It was here, in cities like Metz, Reims, and Cologne, that the foundations of the medieval order were laid.

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