'I went more exactly to see the roomes of that incomparable Palace of Luxemburge in the Fauxbourgs St. Germains, ... The Gallery is of the Painting (of) P: Rubens, being the history of the Foundresses life, rarely designe(d) and greate, at the end of it is the Duke of Orleans's Library, rarely fumish'd with excellent bookes, all bound in Mar(o)quin & guilded: the Valans of the shelves being of greene Velvet, freing'd with gold; in the Cabinet joyning to it, are onely the smaler Volumes, with 6 Cabinets of Medails; and an incomparable (collection) of shells and Achates, whereof some are prodigiously rich & glorious; this Duke being very learn'd in Medails, and Plants, nothing of that kind escapes him.' (De Beer 1955, vol. 2, p. 128; Dykes 2018a, p. 122; Burnett 2020b, p. 825 n. 51)