Isabelle de Montmorency, duchesse de Mecklembourg, Pierre Mignard I, between 1675 and 1699
So-called portrait of élisabeth-angélique de montmorency-bouteville (1626-1695), but it's probably a portrait of madame de ventadour (1654-1744)
identification made by ecummenic (talk · contribs), based on comparison with some portraits of this lady (see images below). Object Type: painting. Genre: portrait. Date: between 1675 and 1699. Dimensions: height: 74 cm (29.1 in) ; width: 59 cm (23.2 in). Medium: oil on canvas. Depicted People: Élisabeth-Angélique de Montmorency-Bouteville, Madame de Ventadour. Collection: Palace of Versailles. So-called "Isabelle de Montmorency, duchesse de Mecklembourg" - Versailles