Luigi Sincero (26 March 1870 – 7 February 1936) was a Roman Catholic Cardinal and President of the Pontifical Commission for the Authentic Interpretation of the Code of Canon Law and Secretary of Sacred Congregation for the Oriental Churches, the title of Prefect held by the Popes from 1917 until 1967.

[2] Pope Pius appointed Sincero Secretary of the Congregation for the Oriental Churches on 29 January 1927.

[3] He opted for the order of cardinal priests and his deaconry was elevated pro hac vice on 17 December 1928.

Pope Pius appointed him titular archbishop of Petra di Palestina on 11 January 1929.

Pope Pius appointed him president of the Pontifical Commission for the Codification of the Oriental Canon Law on 23 November 1934,[4] and president of the Pontifical Commission for the Authentic Interpretation of the Code of Canon Law on 12 December 1934.