Emperor Ningzong (Wade-Giles spelling: Emperor Ning-tsung; ; 19 November 1168 – 17 September 1224) was the 13th emperor of the Song Dynasty who reigned from 1194 to 1224. His temple name means "Tranquil Ancestor". His reign was noted for the cultural and intellectual achievements. In particular, Zhu Xi wrote some of his most famous works during this period. However, Ningzong personally was known for aversion to the daoxue spread at court.