Memorial for Yelü Yanning

41°38′N 120°12′E / 41.63°N 120.20°E / 41.63; 120.20 The Memorial for Yelü Yanning (耶律延寧), also known as the Epitaph for Yelü Yanning, is the oldest known Khitan inscription of significant length and currently the oldest major written attestation of a Mongolic (or Para-Mongolic) language. Dated 986, it is inscribed with 19 lines (271 characters) of Khitan large script. It was found in the winter of 1964 on Baimu Mountain in northwest Baishugou Village, Xiwujiazi Township, Chaoyang County, Liaoning Province, China and is now kept in the Liaoning Provincial Museum.

The Khitan word jau ("hundred") which occurs in line 13 of the upper-right Khitan section of the inscription and which is written with the large script character is one of the earliest fully deciphered Mongolic words preserved in a Mongolic inscription.