The Pyu city-states (Burmese: ပျူ မြို့ပြ နိုင်ငံများ [pjù mjo̼.pjɑ̼ nàɪɴŋàɴ mjá]) were a group of city-states that existed from about the 2nd century BCE to the mid-11th century in present-day Upper Myanmar. These city-states were founded as part of the migration of the Pyu people from Tibet to Mainland Southeast Asia by the Tibeto-Burman-speaking Pyu settlers, the earliest inhabitants of Burma of whom records are extant. The thousand-year period, often referred to as the Pyu millennium, linked the Bronze Age to the beginning of the classical states period when the Pagan Kingdom emerged in the late 9th century.
The major Pyu city-states were all located in the three main irrigated regions of Upper Burma: the Mu River Valley, the Kyaukse plains and Minbu region, around the confluence of the Irrawaddy and Chindwin Rivers. Five major walled cities- Beikthano, Maingmaw, Binnaka, Hanlin, and Sri Ksetra- and several smaller towns have been excavated throughout the Irrawaddy River basin. Halin, founded in the 1st century AD, was the largest and most important city until around the 7th or 8th century when it was superseded by Sri Ksetra (near modern Pyay) at the southern edge of the Pyu Realm. Twice as large as Halin, Sri Ksetra was eventually the largest and most influential Pyu centre. Only the city-states of Halin, Beikthano and Sri Ksetra are designated as UNESCO World Heritage Sites, where the other sites can be added in the future for an extension nomination.
