Marie antoinette' gossip guide 18th century: marie, Joseph ducreux after french, 1735-1802, marie antoinette as a young girl. dates not recorded, oil on canvas. museum of fine arts, boston. American duchess: 18th . cockades, American duchess is a costume blog designed to educate and entertain those interested in learning more about 18th c. fashion and costuming of other centuries. Biography georgiana, duchess devonshire | georgiana, Georgiana, duchess of devonshire is an ancestor of the new royal baby, the prince of cambridge. more info about georgiana: here web page for “the duke.