Editing Johann Joachim Quantz (section)

===1741–1773: Court of Frederick===
[[File:Adolph Menzel - Flötenkonzert Friedrichs des Großen in Sanssouci - Google Art Project.jpg |thumb|[[Frederick II of Prussia|Frederick the Great]] playing a [[flute concerto]] in [[Sanssouci]], [[Carl Philipp Emanuel Bach|C. P. E. Bach]] at the harpsichord, Quantz leaning on the wall to the right; by [[Adolph Menzel]], 1852]]

When Frederick II became King of Prussia in 1740, Quantz finally accepted a position as flute teacher, flute maker and composer. He joined at the court in Berlin in December 1741 and stayed there for the rest of his career.{{sfn|Dikmans}} He made flutes from at least 1739 and was an innovator in flute design, adding a second key (Eb, in addition to the standard D#) to help with intonation, for example. Frederick owned 11 flutes made by Quantz.{{sfn|Owens|Reul|Stockigt|p=102}}

As well as writing hundreds of sonatas and concertos, mainly for the flute, he is known today as the author of ''Versuch einer Anweisung die Flöte traversiere zu spielen'' (1752){{sfn|Quantz|1752}} (titled ''On Playing the Flute'' in English),{{sfn|Quantz|2001}} a treatise on traverso flute playing. It is a valuable source of reference regarding [[authentic performance|performance practice]] and flute technique in the 18th century.

Quantz never joined his orchestra, lived in [[Berlin-Mitte]] (Kronenstrasse),{{sfn|Nicolai|1786|p=393}} but played at Frederick's court until his death in 1773. A biography appeared in 1755 in Friedrich Wilhelm Marpurg's ''Historisch-kritischen Beyträgen zur Aufnahme der Musik''; another, in Italian, followed in 1762. His grandnephew, Albert Quantz, published a full-length biography in 1877.