Angria or Angaria (German: Engern) is a historical region in the present-day German states of Lower Saxony and North Rhine-Westphalia. The chronicler Widukind of Corvey in his Res gestae saxonicae sive annalium libri tres denoted it as the central region of the medieval Duchy of Saxony lying along the middle reaches of the Weser river between Westphalia and Eastphalia.