Arbāyistān (Parthian: 𐭀𐭓𐭁𐭉𐭎𐭈𐭍 [ʾrb]ystn, Zoroastrian Middle Persian: Arwāstān, Syriac: Bēṯ ʿArbāyē, Armenian: Arvastan)[1] was a Sasanian province in Late Antiquity. Due to its situation and its road systems, the province was a source of income from commercial traffic, as well as a constant area of contention during the Roman-Persian wars.[2]