Keyboard concertos by Johann Sebastian Bach left Weimar in 1717. Many of Bach's orchestral harpsichord concertos are adapted from a model with one or more violin solo parts. Several of these earlier models are extant. The oldest of these is Vivaldi's concerto for four violins, RV 580, published in 1711, model for Bach's concerto for four harpsichords, BWV 1065. Bach replaced the part of his fourth "Brandenburg Concerto", BWV 1049, composed in 1721 or earlier, by a harpsichord part when he reworked it to the harpsichord concerto BWV 1057. Bach's extant violin concertos BWV 1041–1043, two for a single violin soloist and one for two violin
Piano concertos by Wolfgang Amadeus Mozart Piano concertos by Wolfgang Amadeus Mozart Wolfgang Amadeus Mozart wrote 23 original concertos for piano and orchestra. These works, many of which Mozart composed for himself to play in the Vienna concert series of 1784–86, held special importance for him. For a long time relatively neglected, they are recognised as among his greatest achievements. They were championed by Donald Francis Tovey in his "Essay on the Classical Concerto" in 1903, and later by Cuthbert Girdlestone and Arthur Hutchings in 1940 (originally published in French) and 1948, respectively. Hans Tischler published a structural and thematic analysis of the concertos in 1966,