John Mulvany (c. 1839 – 1906) was an Irish born American artist best known as an artist of the American West who painted the first large (11ftx21ft) image of General Custer’s defeat by the Oglala Sioux Indians at Little Big Horn in 1876. Mulvany’s painting "Custer’s Last Rally", was finished in 1881. In Ireland, he is known for "The Battle of Aughrim", painted in 1885 and exhibited in Dublin in 2010.