Moritz Unna ( 1811 - 1871 ) was a Danish painter. Moritz Unna s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 264.82 USD for A coast scene with the fortress Karlsten, Marstrand, Sweden in 2006 to 1316.67 USD for Unknown in 2009 , based on the size and medium of the artwork.