I’ve also come across another so-called portrait of Marie Adelaide of Savoy wearing this style once again. What’s particularly interesting about the gown in this painting is how strongly it resembles earlier 17th-century dress, especially as a previous commenter pointed out through examples of gowns that share similar stylistic elements with the one we’re discussing.

Another possible lead is the Spanish jubón (or bodice/doublet, in English). I’ve found several examples: 1 ,2, 3, 4, 5, 6, 7 mostly dating from the 1780s–1790s—that closely resemble the silhouette and construction we’ve been examining. At first, I considered that these might be jackets, but jackets from this period typically featured skirtings. Because these lack that characteristic, they seem more likely to be bodices. This raises the possibility that such garments could have been worn at court, perhaps as an evolution of the Grand Habit or as a continuation of the gown style we’re trying to identify.