According to The New Penguin Dictionary of Music
, Muzio Clementi was an Italian composer and pianist who, showing great gifts as a child, was taken to England by Peter Beckford M.P., and thereafter lived mainly there; died at Evesham. Composed mainly for piano, pioneering a new (non-harpsichord) technique. Works include more than 60 sonatas and a famous collection of studies "Gradus ad Parnassum"; also symphonies, chamber music, etc. Also entered the piano manufacturing trade.