Barba, Giovanni an Italian advocate and bishop, a native of Naples, had charge of representing the government of Naples among the twelve consistorial advocates. It was owing to Barba that pope Clement XII instituted the society of studies already projected by Sextus V. He died Sept. 11, 1749. He wrote Delle Arte e del Methodo delle Lingue, Libri III (Rome, 1734). See Hoefer, Nouv. Biog. Generale, s.v.