Johann Friedrich Leybold ( 1755 - 1838 ) was a painter. Johann Friedrich Leybold s works have been put up for auction numerous times, with realized prices varying from 164.89 USD for (Mozart playing quatre-mains with a lady, accompanied by a man with a violin in his hand). in 2006 to 372.09 USD for Caritas in 2008 , based on the size and medium of the artwork.