Stiftskirche Baumgartenberg, Gothic parish church in Baumgartenberg, Austria.

Stiftskirche Baumgartenberg is a three-nave church in Gothic style, stretching about 58 meters long with a central nave significantly higher than the side aisles. The layout creates clear spatial divisions within, directing the eye toward the altar and giving the interior distinct zones for worship and contemplation.

Construction started in the 12th century and the church was consecrated in 1243 by the Bishop of Passau. Gothic modifications between 1436 and 1446 gave it the architectural character it displays today.

The church is dedicated to the Assumption of Mary and has served as the parish church since the parish was created by decree on 6 March 1784, when the dissolving monastery's church was assigned to it. Franciscans from the Tyrolean province provided pastoral care from 1889 to 2008. The parish, number 4044, counts 1,348 Catholics and belongs to the Seelsorgeraum Machland with Arbing, Mitterkirchen and Naarn.

The church is concealed behind the three-storey gate tower and the convent wing, so approach through the monastery courtyard to reach the west front with its Romanesque portal. The interior is entered at ground level; the raised nave and the choir with its red Salzburg marble balustrade are reached by steps. The parish also administers the adjoining cemetery.

During restoration work from 1997 to 2001, workers found original medieval paintings hidden beneath later additions and changes. This discovery reveals how the building was transformed and decorated repeatedly across different centuries.