I gioielli della Madonna is a opera in three acts by Ermanno Wolf-Ferrari to an Italian libretto by Carlo Zangarini and Enrico Golisciani, based on news accounts of a real event. First performed in 1911, the opera's controversial themes include love between a brother and his adoptive sister, implied criticism of the Catholic Church, and an on-stage orgy.

Peter Glossop was an English baritone who was the only Englishman to have sung Verdi's great tragic baritone roles at La Scala, Milan. He rose from humble beginnings in Yorkshire to become a leading performer in London and in the major opera houses of Europe and America.