Maria Mikhailovna Siniakova ( 1898 - 1989 ) was a Slovak painter. Maria Mikhailovna Siniakova s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 8953.09 USD for UNTITLED in 2014 to 24279.1 USD for Humankind in 2018 , based on the size and medium of the artwork.