Marianne Loir ( 1715 - 1769 ) was a French painter. Marianne Loir s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 6197.83 USD for PORTRAIT DE FRANÇOISE DE MAILLY-NESLE, PRINCESSE DE MONTBAREY in 2004 to 15714.62 USD for Portrait de Maurice de Saxe in 2008 , based on the size and medium of the artwork.