The 'Arch of Hadrian' or 'Hadrian's Gate'. Built about 1900 years ago, it has two inscriptions facing in opposite directions, naming Theseus and Hadrian as founders of #Athens. The entire monument is made of Pentelic marble from Mount Pentelikon about 18km away. This is the very same marble used to build the #Parthenon. #GoExploreGreece #Athens #Greece #greece🇬🇷 #greecelover_gr #greece_travel #greece💙 #greece_moments #greece_lovers #travel_greece #travel