Director of the Acropolis Museum Prof. Dimitris Pantermalis introduces the temporary exhibition "Eleusis, The great mysteries" at the Acropolis Museum in Athens, Greece, on Feb. 25, 2018. A new temporary exhibition dedicated to the Elefsinian Mysteries opened at the Acropolis Museum in the Greek capital on Monday, taking visitors to a journey back to one of the most important religious sites of ancient Greece which remained a secret through the centuries. (Xinhua/Lefteris Partsalis)