 These artefacts can be seen at the Roman-Germanic Central Museum ("Römisch-Germanisches Zentralmuseum") in Mainz.When the Romans needed bricks to build their castra, they took as their raw material the loam from Dexheim to shape and fire into bricks.In 774 Dexheim had its first documentary mention in a donation document in which Charlemagne bequeathed a great estate to the Lorsch Abbey.