Robert Nanteuil ( 1623 - 1678 ) was a French painter. Robert Nanteuil s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 38.87 USD for Petrus Poncet in 2004 to 15911.18 USD for Portrait de Monseigneur Philibert-Emmanuel de Beaumanoir de Lavardin (1617-1671) in 2011 , based on the size and medium of the artwork.