A Stephan Sedlacek ( 1868 - 1936 ) was a German painter. A Stephan Sedlacek s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2122.68 USD for An unwelcome interruption in 2004 to 51181.1 USD for Harlem interior with dancing women. in 2010 , based on the size and medium of the artwork.