Rey or Ray [Pronunciation: rā] (Persian:شهر ری, Shahr-e-Ray, "City of Ray"), also known as Rhages (/ˈreɪdʒəz/; Greek:Ῥάγαι, or Europos (Ευρωπός) Rhagai; Latin:Rhagae or Rhaganae) and formerly as Arsacia, is the capital of Rey County, Tehran Province, Iran, and is the oldest existing city in the province.