Nisa (also Parthaunisa) was an ancient city, located near modern-day Bagir village, 18 km southwest of Ashgabat, Turkmenistan. Nisa is described by some as one of the first capitals of the Parthians. It is traditionally assumed to be founded by Arsaces I (reigned c. 250 BC–211 BC), and was reputedly the royal necropolis of the Parthian kings, although it has not been established that the fortress at Nisa was either a royal residence or a mausoleum.