Helga Koen ( 1937 - 2002 ) was a painter. Helga Koen s works have been put up for auction numerous times, with realized prices varying from 298.19 USD for Maifest 1993 in 2005 to 331.32 USD for Blick über die alte Brücke auf die Schlosskirche in Saarbrücken in 2005 , based on the size and medium of the artwork.