 Although excavations started in 1938, it was not until the 1950s that it was determined that the site had been abandoned as early as the 11th century and therefore would not be identical with Balasagun, which had flourished until the 14th century.The archaeological site of Suyab covers some 30 hectares.As a testimony to Suyab's diverse and vibrant culture, the site encompasses remains of Chinese fortifications, Nestorian Christian churches, Zoroastrian ossuaries, and Turkic balbals.