Johannes Grenness ( 1875 - 1963 ) was a Danish painter. Johannes Grenness s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1504.44 USD for Knaben am Strand in 2004 to 14602.85 USD for Lekende gutt på sten med seilbåt in 2006 , based on the size and medium of the artwork.