The town was occupied successively in the 5th century by Alamanni,
Huns and
Franks, who gave it its present name. In
842, Strasbourg was the site of the
Oath of Strasbourg, the text of which is considered to contain the oldest written document in the
French language. A major commercial centre, the town came under control of the
Holy Roman Empire in
923, through the homage paid by the Duke of
Lorraine to German King
Henry I.
