Giuseppe Siboni (27 January 1780 – 28 March 1839) was an Italian operatic tenor, opera director, choir conductor, and voice teacher. He began his career in his native country in 1797 and actively performed in major Italian opera houses up through 1818. From 1806 to 1809 he performed successfully in London, and from 1810 to 1814 he was active in Vienna, where he enjoyed the friendship of Ludwig van Beethoven. He played a critical role in Danish musical life from 1819 until his death in 1839. In 1819 he joined the Royal Danish Theatre in Copenhagen, where he worked first as a singer and later as director of the opera chorus and head director. In 1827 he founded the Royal Conservatory of Music in Copenhagen. He was married three times during his life, including his second marriage to the sist