vardlokkurulv:Frederick the Great playing a flute concerto in Sanssouci, C. P. E. Bach at the piano,
vardlokkurulv:Frederick the Great playing a flute concerto in Sanssouci, C. P. E. Bach at the piano, Johann Joachim Quantz is leaning on the wall to the right, 1852 - by Adolph Menzel -- source link