The publication of the Douze Grandes Études (Op. 10) in 1833 provided the musical world with its first conclusive evidence of the depth of Chopin's creative talent. They mark the end of his artistic adolescence, the clear beginnings of a maturity that was resoundingly confirmed by the contents of his second collection (op. 25). These etudes are inspired by Paganini's caprices, and were written between 1829 and 1836. Individual études became the first pieces by Chopin to appear in many pianists' concert programmes.