Strasbourg, Oath of definition of Strasbourg, Oath of in the Free Online Encyclopedia.

Strasbourg, Oath of, 842, oath sworn by Charles the Bald (later Holy Roman Emperor Charles II Charles II or Charles the Bald, 823–77, emperor of the West (875–77) and king of the West Franks (843–77); son of Emperor Louis I by a second marriage.
..... Click the link for more information. ) and Louis the German Louis the German, c.804–876, king of the East Franks (817–76). When his father, Emperor of the West Louis I , partitioned the empire in 817, Louis received Bavaria and adjacent territories.
..... Click the link for more information. in solemnizing their alliance against their brother, Emperor Lothair I Lothair I (lōthâr`), 795–855, emperor of the West (840–55), son and successor of Louis I .
..... Click the link for more information. . The chief political result of this alliance was the Treaty of Verdun (843; see Verdun, Treaty of Verdun, Treaty of, the partition of Charlemagne's empire among three sons of Louis I , emperor of the West. It was concluded in 843 at Verdun on the Meuse or, possibly, Verdun-sur-le-Doubs, Soâne-et-Loire dept., E France.
..... Click the link for more information. ). Each brother made his oath in the language of the other's followers, so that it might be understood. The version used by Louis is often considered the oldest known specimen of French.