The Opus sacerdotale Amici Israel or the Clerical Association of Friends of Israel, was a short-lived international organization of Roman Catholic priests founded in Rome in February 1926. Its purpose was to pray for the conversion of the Jews and to promote a favorable attitude towards them within the Roman Catholic Church. By the end of the year, its membership included 18 cardinals, 200 bishops and about 2,000 priests. When the association was dissolved by the Holy Office on 28 March 1928, its membership included 19 cardinals, more than 300 bishops and archbishops and about 3,000 priests.