Francesco Carbone Tomacelli (died June 18, 1405) was Italian cardinal at the time of the Great Western Schism. He was nephew (possibly adopted) of Pope Boniface IX. He was born in Naples and in his youth entered the Order of Cistercians. He supported Pope Urban VI against the claims of Antipope Clement VII after the election of the latter in 1378. He was elected bishop of Monopoli at the end of 1382 and in the consistory of December 17, 1384 he was created cardinal. Legate in the Kingdom of Naples to secure its support for the Roman Obedience. Grand penitentiary and archpriest of the patriarchal Lateran Basilica from 1389 until his death. He participated in the papal conclave, 1389. He became close adviser of the new pope Boniface IX, who was his uncle. He participated in the papal conclav