The Corinthian capitals of these spectacular amethyst quartz columns are based on the celebrated model by Pierre Gouthière of circa 1775-1780, now in the Louvre (inv. MR XI 1077). Surmounting a porphyry column, Gouthière's capital was lot 122 in the sale of the duc d'Aumont's collections on 12 December 1782. Estimated at 1,500 livres, the column and capital were bought by Louis XVI for 6,999 l. 19 s. (D. Alcouffe et al., Gilt Bronzes in the Louvre, Dijon, 2004, cat. 122, p. 244).