Pen and ink with wash and watercolour The two roundels depict, on the left, the obscure myth of Jupiter and Garamantis, in which the nymph was ravished by the god after a crayfish caught her by the toe; and on the right, Syrinx escaping the lascivious Pan by being turned into a reed. The frames in the curves of the vault were to be filled with landscapes by Gaspard Dughet.