The 15th Meridian passes through the Municipality of Trebnje; a half of an imaginary great circle that connects the Earth’s poles and all the locations, where the sun rises, peaks and sets at the same time, and determines the longitude 15° 00´ 00´´.

On the lookout point on top of the hill of Vrhtrebnje a stone plaque with a sun dial and a bronze relief of Slovenia was built, where important cities, higher peaks and the course of the 15th Meridian in Slovenia are shown. Also part of the marker is an information board about the 15th Meridian.

The Meridian is also marked at the west entrance into Trebnje with a large sign, showing the exact Central European time. The clock is calibrated to only miss for a single second in a thousand years.

Compiled and edited by Alja Rabzelj.
Translated by Barbara Markelc.