Metten Abbey, or St. Michael's Abbey at Metten (in German Abtei Metten or Kloster Metten) is a house of the Benedictine Order in Metten near Deggendorf, situated between the fringes of the Bavarian Forest and the valley of the Danube, in Bavaria in Germany.
The abbey was founded in 766 by Gamelbert of Michaelsbuch. For many centuries Metten was under the lordship of the Dukes and Electors of Bavaria. When Charlemagne stayed in Regensburg for three years after 788, Utto turned his abbey over to the Frankish ruler, making the Ducal Abbey a Royal Abbey. After the Carolingians became extinct, Metten was turned into an Imperial Abbey. Besides the work of land clearance in the Bavarian border territories, the monks were very active in education. Members of the abbey were not only schoolteachers, but also members of the Bavarian Academy of Science in Munich and professors of philosophy and theology in Freising and Salzburg.
After secularisation in 1803 the abbey's property was confiscated, and by 1815 had all been auctioned off. Over a number of years Johann von Pronath acquired the greater part of the former premises and succeeded in persuading King Ludwig I of Bavaria in 1830 to re-establish the monastery, which by 1837 had been set up to incorporate a boarding school (Gymnasium), in continuance of its educational traditions, which the monastery has run to this day.
The re-founded abbey was very active in re-settling new monasteries. Since 1858 it has been a member of the Bavarian Congregation of the Benedictine Confederation.
Besides the boarding school, the abbey runs various craft enterprises. The library, which is open for tours, contains over 150,000 volumes on theology, philosophy and history.