Apart from demanding concert pieces, Ernesto Köhler (1849-1907) primarily wrote methodological literature and music for playing in the Romantic style which are reminiscent of the small forms of Chopin, Schumann or Brahms and to this day form an inherent part of flute lessons, pupils' concerts and the competition 'Jugend musiziert'. Under this category come the romance Bon soir Op. 29 and Valse Espagnole Op. 57, two expressive character pieces for lessons and concerts.