大秦景教流行中国碑
The first recorded Christian missionary in China was Alopen, a Syriac-speaker, who arrived in Xi'an (then known as Chang'an) in 635 along the Silk Road. The Nestorian Stele, now located in Xi'an's Beilin Museum, is a Tang Chinese stele erected in 781 that documents the 150 years of early Christianity in China following Alopen. It is a limestone block with text in both Chinese and Syriac describing the existence of Christian communities in several cities in northern China. The Daqin Pagoda, a Buddhist pagoda in Zhouzhi County of Xi'an, has been suggested to have originally been a Nestorian Christian church from the Tang Dynasty.