Abdij van Sinnich, Augustinian abbey in Voeren, Belgium

Abdij van Sinnich is a monastery in Voeren featuring a rectangular main structure with a mansard roof and stone-framed windows throughout. The central entrance displays the abbess coat of arms, while gardens stretch along the Gulp River beside the complex.

A priory of Augustinian canonesses was founded at Sinnich around 1243 from Rolduc Abbey, drawing sisters partly from Rolduc and partly from the suppressed Priory of Scharn near Maastricht. The church was consecrated in 1297. The community was dissolved in 1796 after the French Revolution, cleared on 11 February 1797 and sold in 1798 to the Reul family of Teuven.

The monastery accepted only daughters from noble families starting in 1703, reflecting the social hierarchy of Belgian aristocracy in the 1700s. This selective practice made it an important educational center for women of the upper classes.

The abbey is private property and not open to the public. The tower and front facade can be seen with some effort from the road; the Gulp flows through the western garden, which is not a visitor area.

The abbess's residence carries the coat of arms of Anne-Caroline van den Bergh above the entrance, dated 1756, though the French source gives 1754. The gatehouse keystone reads 1856, a date added long after the community was expelled in 1797.