From Wikimedia. Photo - Daderot; reflections from flaws in the original work in the upper left suppressed with Photoshop by gogm.
Baroness Guiger de Prangins' coiffure thrusts up, not out, dating this to the late 1770s. Her dress has a tent bodice that extends out over her skirt as an over-skit. Ruched panels are used for edging throughout her dress.