From the Bronze Age and the Iron Age come the remnants of barrows in the "Jungenwald" (woods) between Jettenbach and Kollweiler. Little of these mounds’ contents survives. Among the remnants, however, are an axe and a sacrificial blade. Discovered on the "Wingertsberg" (mountain) was a grave field dated to early Roman times. On the peak of the "Potschberg", now been stripped away by stone quarrying, the remnants of a mountain sanctuary from the 2nd or 3rd century AD (Roman period) were found in 1965. Three Roman-era homesteads lay within Jettenbach's current limits with others are suspected. Quite a few coins from the first to the fourth centuries A.D. have been unearthed locally as a result of land surveys along with water pipes and a 5 cm-tall 2nd-century bronze figure of the god Mercury.