Siri Derkert ( 1888 - 1973 ) was a Swedish painter and sculptor, known for Expressive, Cubist and Fauve painting. Siri Derkert s works have been put up for auction numerous times, with realized prices greatly surpassing estimated prices, varying from 1524.78 USD for TORA in 2003 to a remarkable record 233541.48 USD for RYTTARE in 2016 , based on the size and medium of the artwork.