The church of Our Lady’s Assumption in Trebnje stands on the site of an older church, which was first mentioned in 1170. In the 11th century, at the time of the Carinthian knights of Trebnje, the then owners of Trebnje Castle, the parish belonged to Aquilea. For a long time it was the “emperor’s parish” and in 1617 it was joined to the monastery in Stična. This is thought to have been the location of the temple of Jupiter already in Roman times.
The current three-nave building was built in 1443, in late Gothic style with a typical slender bell-tower with a pointed Gothic roof, which even nowadays is a dominating and visually indispensible component of Trebnje. In 1645, the church was given an arched ceiling and in the second half of the 18th century a new altar was added. The main altar is the work of the wood carver Janežič, with a painting of Mary’s assumption by Matevž Langus. The Stations of the Cross are also by Langus, while the frescoes in the sanctuary are by Koželj. The cellar underneath the presbytery which now contains a chapel, has very nice arches in the same style.
A stone relief with three busts from Roman times has been built into the wall of the church vestibule, while the wall of the presbytery also features part of an inscription stone from Jupiter’s temple. In the times of Turkish incursions, the church was surrounded by a wall, which is no longer visible.
On the feast of Candlemas, 2 February 1854, Bishop Friderik Baraga held a solemn pontifical Mass in the church during which he confirmed his sister Amalija’s grandson. There is a statue of Baraga in front of the church, the work of the sculptor France Gorše from 1978, as well as a Eucharistic cross. On the northern facade, there is an interesting monument in honour of those that died in the First World War and in the parish park there is a monument in memory of the suppressed victims of the Second World War.