Neukloster Abbey was a Cistercian abbey in Wiener Neustadt, in Lower Austria. In 1881, it became a priory of Heiligenkreuz Abbey.

Heiligenkreuz Abbey is a Cistercian monastery in the village of Heiligenkreuz in the southern part of the Vienna woods, c. 13 km north-west of Baden in Lower Austria. It is the oldest continuously occupied Cistercian monastery in the world.