Lucifer of Siena (3rd century – 4th century), was the first bishop of Siena. He was appointed in 306, two years after the death of Saint Ansano.Gaetano Moroni, Dizionario di erudizione storico-ecclesiastica da S. Pietro sino ai nostri giorni, Tipografia Emiliana, Venezia 1854, volume LXV, p. 55.
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