Concerto for flute in D Major No. 2

G.B. Pergolesi: Flute Concerto in D major No. 2 was written around the 1730s – 1740s. The status of the flute concertos attributed to Pergolesi is one of the most famous cases of disputed authorship in Baroque and Classical music scholarship.
Pergolesi died at the age of 26 in 1736. Following his death, his fame (particularly due to his Stabat Mater) skyrocketed across Europe. Publishers, seeking to capitalize on his "brand," frequently attached his name to works by lesser-known or anonymous composers.
Research, following the discoveries at the library of the Royal Swedish Academy of Music in Stockholm, suggests the Concerto in D Major may actually be the work of Swedish-German composer Johann Joachim Agrell (1701–1765). Unlike the "Pergolesi" editions, which were often printed by opportunistic publishers after 1736, this source specifically identifies Agrell as the composer. Agrell was deeply influenced by the style of Antonio Vivaldi, and the D Major concerto displays the rigorous ritornello structure and "adventurous" harmonic progressions typical of Agrell’s confirmed output from the 1730s and 40s.
Agrell was a noted violinist and keyboardist who served at the court in Kassel. He was highly active in the "modern" German Galante style during the 1740s, whereas Pergolesi (who died in 1736) focused primarily on Neapolitan vocal and sacred music.
As a prominent figure in mid-18th-century Europe, Agrell's music circulated widely. The "Pergolesi" attribution is widely regarded by scholars as a marketing tactic used by 18th-century publishers to sell the works of Northern European composers under a more famous Italian name.