The Celtic hill fort of Otzenhausen is one of the biggest fortifications the Celts ever constructed. Built by Gauls of the Treveri tribe on top of the Dollberg in Germany, the only visible remains are 2 circular earth ramparts, covered with stones. 5th-1st century BCE [1120×1575]

> The Celtic hill fort of Otzenhausen is one of the biggest fortifications the Celts ever constructed. It was built by Gauls of the Treveri tribe, who lived in the region north of the fort. The fort is located on top of the Dollberg, a hill near Otzenhausen in Germany, about 695 m above sea level. The only visible remains are two circular earth ramparts, covered with stones.

> In times of war, the circular rampart was a strong fortification against enemies. Theories suggest this one might have been more than just a refuge. There might have been a permanent settlement, a village or the seat of a local leader.

> The first fortification was constructed in the 5th or 4th century BC, but the real heyday of construction dates to the 2nd and 1st century BC. For reasons yet unknown, the fort was abandoned shortly after this expansion.

> The site is formed in the shape of a triangle with rounded ends. One rampart surrounds the whole fort. On the southern side, another similar embankment is built about 40 metres in front of the main one. The ends of this outer rampart approach the main one but do not touch it. Because the entrance of the main rampart is located on the western side, no significant purpose for the outer one has been determined. From west to east the fort extends 460 m, from north to south 647 m. The total length of the ramparts is 2500 metres and they contain 240,000 cubic metres of stone. Thousands of beams were attached to the ramparts which, as the diagram shows, probably presented a vertical stone wall to the exterior.

[https://en.m.wikipedia.org/wiki/Hillfort_of_Otzenhausen](https://en.m.wikipedia.org/wiki/Hillfort_of_Otzenhausen)