Located at a distance of 4 km from the village of Starosel, the Thracian temple complex was discovered in 2000. This temple complex contains the oldest royal Thracian complex with a mausoleum ever discovered. It dates from the late 5th and early 4th centuries BC.
The Thracian temple complex at Starosel occupies six temples which are located under the hill, four of these temples are unique, as well as some royal tombs. The big temple in Chetinyova Mogila and the Horizon temple are open for tourist visits.
The entire hill is surrounded by a wall made of blocks of granite. The length is 241 meters and the height reaches 3.5 meters. The wall is called krepis and forms a circle that, according to Thracian religious belief, symbolizes the sun. The entrance to the temple has a parade staircase and two pedestals with lion statues.
The temple on the Chetinyova Mogila is located in a region with many rock temples and mounds.