Merv (Turkmen: Merw, Persie: مرو, Marv), umwhile Achaemenid Satrapy o Margiana, an later Alexandria (Ἀλεξάνδρεια) an Antiochia in Margiana (Greek: Ἀντιόχεια τῆς Μαργιανῆς), wis a major oasis-ceety in Central Asie, on the historical Silk Road, locatit near the day's Mary in Turkmenistan.