A large Mithras relief was found at Osterburken
when a cellar was dug not far from the Kirnachbrücke at the beginning of the Bofsheimerstrasze in 1861. The relief points to a Mithraeum which, however, could not be excavated bodily owing to the water of a well in the immediate neighbourhood. The monument had been covered carefully with sand and before it stood two altars in sandstone (H. 1.28 and 1.10 Br. 0.59 and 0.65 D. 0.19 and 0.23). At a depth of 2.