The Nisaean plain (also spelled Nesaean; Greek: Nḗsaion pedíon) [a] was a fertile plain in Media, a historic region in Iran. [1] [2] It was best known for being the home of the esteemed Nisaean horse. [1] [3] The plain may be identical with the Nisaya district mentioned in the Behistun Inscription of Darius the Great ( r. 522–486 BC). [1] However, Rüdiger Schmitt notes that this cannot be strictly proven. [1] The name of the plain possibly survived into the Medieval era, as Yaqut al-Hamawi, writing in the 13th century, mentioned a town in Hamadan (ancient Ecbatana) with the name Nisa. [1] The city of Nahavand is located on the Nisaean plain. [2]