Gaetano Amadeo was born in 1824 at Porto Maurizio, a small town in Ligurian Riviera, Italy. He died in Nice, France Avril, 8th 1893. His reputation resulted into an entry in biographic dictionnaries, such as Schmidl's and Treccani's in Italy and eulogistic obituaries in some French, Italian and German journals. But he became forgotten. Most of his career took place in Marseille, where he lived for 27 years and founded a school of plain-song, an exceptional undertaking in this time.