Auguste Charles Léonard François Vianesi (2 November 1837 – 4 November 1908) was an opera conductor, born in Italy and later naturalised French. His repertoire consisted mostly of French and Italian opera, in which he directed some of the world's great singers including Pauline Viardot, Christina Nilsson, Marcella Sembrich, the brothers Edouard and Jean de Reszke, and Feodor Chaliapin in the opera houses of London, Paris, Melbourne, St. Petersburg, Boston and New York