Four gentlemen met at this point around 500 years ago: Jünkerath, Kronenburg, Schmidtheim and Blankenheim. The coats of arms and first letters of the first three territories can still be seen on the boundary stone made of basalt lava stone. Much indicates that the side facing the town of Esch used to bear the coat of arms of the House of Blankenheim.
Here in the Dahlemer Wald, on the border between North Rhine-Westphalia and Rhineland-Palatinate, Agrippastraße winds its way through the terrain in wide serpentine lines. Unusual for a Roman road, but there is a simple reason for it: The road construction engineers based the route on the ridge between Esch and Schmidtheim, which is a distinctive watershed between the rivers Kyll and Ahr. Such a high path remains passable even when the river valleys are flooded.
Originally the street was 5.55 meters wide. For their construction, the road builders first removed the humus and layered weathered gray sandstone on the clay soil to secure it. The sandstone was covered by a thin layer of rubble stone. Finally, the road surface was given a six centimeter thick water-bound cover.
Today the road embankment is up to 1.70 meters high and recognizable as a winding line over a length of approx. 2.7 kilometers in the forest. In the area of the Vierherrenstein a removal pit interrupts the ancient road - a local brickworks extracted its raw material here. The road embankment reappears behind the pilgrim's cross on the Escher side and runs about 150 meters parallel to today's road before it disappears into the terrain.