medal Christ crucified into an oak tree with the opening date of the Abbey 1 January
1139 Zwettl Abbey was founded in 1137 by
Hadmar I of Kuenring, with Herrmann, a monk of
Heiligenkreuz Abbey, as its first abbot (1137–47). It was a daughter house of Heiligenkreuz, of the line of
Morimond. The foundation was confirmed by
Hohenstaufen dynasty king
Conrad III of Germany in 1139, and
Pope Innocent II in 1140 and over the course of time by several other popes and emperors. Several members of the family of the founder were buried here. The monastery was constructed, as Cistercian houses often were, in a river valley, in this case in a bend of the River
Kamp. Extensive buildings were erected, and the church, chapter-room, and dormitory were blessed in 1159, though the entire monastery was not completed until 1218. Zwettl Abbey soon became one of the most important monasteries in the order. Towards the end of the fourteenth century, the abbey was repeatedly plundered, especially in 1426, when 4,000
Hussites sacked and burned it down. It was rebuilt under Abbot John (1437–51). Near the end of the fifteenth century, over forty monks lived in Zwettl Abbey. Under the
Protestant Reformation the community was reduced to six monks and one secular priest. By an imperial rescript the monastery was forced to sell one quarter of its large possessions. It flourished again under Abbot Erasmus (1512-1545) and his successors during the Baroque period, notwithstanding the
Thirty Years' War and the Turkish invasion, during which it was saved from destruction by the friendship of the
Count of Thurn for Abbot Siegfried. During the administrations of Abbot Linck (1646–71), author of the
Annales Austrio Claravallenses, and Abbot Melchior (1706-1747), who rebuilt a great part of the abbey and enriched it with many precious vessels and vestments, it reached its zenith. Abbot Melchior encouraged study and opened schools of philosophy, theology and so on in the monastery. During the period of
Josephinism Abbot Rainer was obliged to resign, to be succeeded by a
commendatory abbot (1786), but after 1804 the community was allowed to elect its own abbot. From 1878 the abbey was administered by Abbot Stephen Roessler, the sixty-first from its foundation. Besides him two other noted historians were members of Zwettl during the nineteenth century:
Johann von Frast (d. 1850) and
Leopold Janauschek, the author of
Originum Cisterciensium. ==Buildings==