A typical oil lamp from the Bar-Kokhba period. Locally made in Judea, this lamp, found in the tunnels at Herodium, mutates Roman lamps with a round central discus. No artifacts were found in the tunnels dating to the earlier First Revolt period or to the later Byzantine occupation. This evidence assured the excavators that the last use of the underground system was in the time of Bar Kokhba, about 135 A.D.