Johan Zacharias Blackstadius ( 1816 - 1898 ) was a Swedish painter. Johan Zacharias Blackstadius s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 223.8 USD for tillskriven: Fåglen i buren in 2004 to 1503.22 USD for historiserande motiv in 2007 , based on the size and medium of the artwork.