Albertus Jacob Frans Grégorius ( 1774 - 1853 ) was a Belgian painter. Albertus Jacob Frans Grégorius s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 895.27 USD for A PORTRAIT OF LOUIS CHARLES D`ORL√âANS (DIED 1808), HEAD AND SHOULDERS, WEARING A BLUE FROCK COAT AND A WHITE WAIST-COAT in 2003 to 4000 USD for PORTRAIT OF A GENTLEM