Sidoktaya
Sidoktaya is one of the oldest ancient towns in Myanmar. It is established by Prince Yazakumar (a. Min Zaya Khittaya or Min Thiri Khittaya) in Year 460 (Myanmar Era) (about 1098 A.D.). Now it is over 900 years of age. there are many archaeological places including Si-kyek-taung Pagoda, Aung-kyar Thiri Pagoda, and Sutaungpyi Pagoda. The ancient city wall had been found buried in some places.
Sri Ksetra Kingdom
Sri Ksetra (Śrī Kṣetra, သရေခေတ္တရာ ပြည်, IPA: [θəjè kʰɪʔtəjà pjì]; lit. "Field of Fortune" or "Field of Glory"), located along the Irrawaddy River at present-day Hmawza, was once a prominent Pyu settlement. The Pyu occupied several sites across Upper Myanmar, with Sri Ksetra recorded as the largest, the city wall enclosing an area of 1,477 hectares, although a recent survey found it enclosed 1,857 hectares within its monumental brick walls, with an extramural area of a similar size, being the largest Southeast Asian city before Angkor times. Issues surrounding the dating of this site has meant the majority of material is dated between the seventh and ninth centuries AD, however recent scholarship suggests Pyu culture at Sri Ksetra was active centuries before this.