The village of Siegenfeld in the March of Austria possibly arose around 1040.
In 1133 the Babenberg margrave Leopold III established the Heiligenkreuz monastery in the sparsely settled area.
Another nearby village, mentioned as Muchersdorf in an 1136 deed, later became abandoned.

Over the centuries, a small settlement grew outside the monastery walls, which was incorporated as the present-day municipality in 1849.
The village of Siegenfeld in the March of Austria possibly arose around 1040. In 1133 the Babenberg margrave Leopold III established the Heiligenkreuz monastery in the sparsely settled area. Another nearby village, mentioned as Muchersdorf in an 1136 deed, later became abandoned.
Over the centuries, a small settlement grew outside the monastery walls, which was incorporated as the present-day municipality in 1849.
Heiligenkreuz, Lower Austria