Grethe Bagge ( 1925 - 2012 ) was a painter. Grethe Bagge s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 382.35 USD for Portrait composition of Danish opera singer Thyge Thygesen in 2015 to 1580.08 USD for Still life with tulips in 2017 , based on the size and medium of the artwork.