Teodorico Pedrini, C.M. (June 30, 1671 – December 10, 1746), also known by his Chinese name De Lige (Chinese: 德理格), was an Italian Vincentian priest, musician and composer, but he was mainly a missionary at the imperial court of China for 36 years.
Pedrini was born in Fermo, in the Marche, then part of the Papal States. He was the founder of the Church of Our Lady of Mount Carmel, Beijing. He was the music teacher to three sons of the Qing dynasty's Kangxi Emperor, and he was co-author of the first treatise on Western Music theory ever written in Chinese: the LǜlǚZhèngyì-Xùbiān, later included in the Siku Quanshu.