From 1760 on, the newly invented piano quickly replaced the harpsichord throughout Europe. Its dynamic and expressive capabilities encouraged the development of new forms both by Classicists, such as Haydn and Mozart, and by the first Romantics. At this same time, the middle of the 18th century, the traverso was immensely popular. Its often melancholic sweetness and subtle colors made it the instrument par excellence for expressing the new sensibilities. Piano and flute went very well together for some time, sharing numerous sonatas in which all the features of a new emotional language were developed.