Johann Conrad Hamburger ( 1809 - 1871 ) was a German painter. Johann Conrad Hamburger s works have been put up for auction numerous times, with realized prices varying from 425.92 USD for Miniature portrait of a fashionable lady in 2009 to 726.06 USD for Portrait of a lady with dark curls and a red cape in 2011 , based on the size and medium of the artwork.