(b Kraków, c1798; d Paris, 10 Aug 1860). American pianist, composer and publisher of Polish birth. He was in New Orleans by 1818, when he is recorded as taking part in a concert; he frequently played the piano, as soloist and accompanist, until 1830. He is credited with the first performance in the USA of a piano concerto by Beethoven, in 1819. In 1824 he composed A Warlike Symphony, Grand Military March, and a comic opera, The Military Stay, all now lost. He became a music dealer in 1826 and opened his own store in New Orleans in 1830, but sold it in 1846 to W.T. Mayo (who sold it in turn in 1854 to P.P. Werlein). In the early 1830s Johns published jointly with Pleyel in Paris his Album louisianais, an elegant collection of songs and piano pieces, the first music known to have been written and published in New Orleans. A few pieces of sheet music also survive. He went to Paris in 1832 and met Chopin, who subsequently dedicated his Mazurkas op.7 to Johns. Johns was organist at St Louis Cathedral in 1843–4. A cotton magnate in later life, he served as Russian consul in New Orleans from 1848 to 1860.