The Ancient City of Doliche or Duluk Doliche, also known as Duluk, is a city with a rich history that can be traced back to 6000 B.C. Archeological findings reveal that Flintstone tools were made in workshops located in the southern terraces of the ancient city during the Lower Palaeolithic Period. Archeologists refer to these tools as "dülükien" and believe that they prove Dülük to be one of the oldest settlements in the world. Doliche is a significant religious center that has been associated with three different beliefs: Dülük during the Hittite Empire Period, Teshup during the Hellenistic Period, and Jupiter Dolikhenos during the Roman Period. The city's remains reflect its history as an ancient Roman city that was established as a sacred site for Jupiter Dolikhenos. Duluk, in addition to being a religious center for different beliefs such as Duluk (Hittite Empire Period), Teshup (Hellenistic Period) and Jupiter Dolikhenos (Roman Period), was also a site of significance for the religion of Mithraism. Two of the most important Mithraic temples, which were built underground, were found in Duluk. The rituals that took place in these temples involved the sacrifice of a bull, the largest animal in nature, and the drinking of its blood to gain power from the god. An embossment depicting the sacrifice of a bull, known as Tauroktoni, is located in a niche on one side of the mihrab section of one of the underground temples, which contains two rooms that are both important in the main Mithraeum in Doliche. The religion of Mithras is particularly enigmatic, as it was based on concepts that were only revealed to the most closely adherent members. Since there are no primary texts and membership was highly selective, there is little written evidence about the depth of their beliefs.