Heiligenkreuz Abbey (Stift Heiligenkreuz) is a Cistercian monastery in the village of Heiligenkreuz in the southern part of the Wienerwald woods. It is the oldest continuously occupied Cistercian monastery in the world. The monastery was founded in 1133 by Margrave St. Leopold III of Austria.

Entrance to the abbey is through a large inner court in the centre of which stands a Baroque Holy Trinity Column, designed by Giovanni Giuliani and completed in 1739. In 1802 an institute for philosophical and theological studies was established, which became a Hochschule in 1976. The Benedict XVI Philosophical-Theological University is now one of the largest faculties for the education of priests in the German-speaking world. Presently, over 90 monks belong to the monastic community.

Below is a selection of photos taken during a visit to the abbey on April 17 2025. Click on a small photo for a larger view, then select the next one with the cursor keys or the arrows on either side of the photo.