Thracian tomb Helvetia

The Thracian tomb "Helvetia" mound near Shipka, Bulgaria, was built in the middle of the 4th century BC.

After this corridor an antechamber is followed by a rectangular chamber with a unique covered ceiling.

This marks the transition from the double-pitched, to the semi-cylindrical, ceiling of chambers in Thracian architecture.

The floor of the tomb is plastered, and the walls of the antechamber and the other rooms were covered with a coating.

Opposite the entrance, a ritual stone bed was located in the room.