In 781 the Christian community in Chang'an erected a tablet known as the Nestorian Stele on the grounds of a local monastery. The stele contains a long inscription in Chinese with Syriac glosses, composed by the cleric Adam, probably the metropolitan of Beth Sinaye. The inscription describes the eventful progress of the Nestorian (Church of the East) mission in China since Alopen's arrival. The inscription also mentions the archdeacons Gigoi of Khumdan and Gabriel of Sarag [Lo-yang; Yazdbuzid, 'priest and country-bishop of Khumdan'; Sargis, 'priest and country-bishop'; and the bishop Yohannan. These references confirm that the Church of the East in China had a well-developed hierarchy at the end of the 8th century, with bishops in both northern capitals, and there were probably other dioceses besides Chang'an and Lo-yang.