[5] The old town center with the parish church stands slightly raised on the left bank of Temenica River, and the new part extends to the north from the railway line and the regional road toward Novo Mesto.

In the Roman times, a settlement named Praetorium Latobicorum was located in the area, along the road linking Emona and Siscia.

Later it also became the seat of the political, judicial, fiscal, and electoral districts as well as an important station on a regular mail connection between Ljubljana and Karlovac.

Trebnje remained a small economic center of its agricultural surroundings until the end of Second World War despite this position.

After 1958, when it became the center of a municipality and a new road between Ljubljana and Zagreb had been built, Trebnje developed metal, woodworking, textile, and construction industries.

The parish church in the town is dedicated to the Assumption of Mary and belongs to the Roman Catholic Diocese of Novo Mesto.