This pavilion was commissioned by the Duke of Penthièvre, then owner of the dukedom-pairie of Rambouillet, in the early 1770s. It retains a delightful decoration composed of plaster medallions imitating the porcelain biscuit, highlighted by a shades of blue and low panelling in faux-marble. A space of interpretation with audio-visual retraces the history of the place.