Cistercian Abbey of Zwettl A filiation of Heiligenkreuz, of the line of Morimond, situated in Lower Austria, in the Diocese of St. Hippolyte. This monastery was founded in 1137 by Hadmar I of Kuenring, with Herrmann, a monk of Heiligenkreuz, as its first abbot (1137-47). The foundation was confirmed by Innocent II (1140) and by several other popes and emperors (...)