At the end of 1799 he became curator of antiquities of the Musée Napoleon housed in the Louvre, many of which were familiar to him as booty removed under the stipulations of the Treaty of Tolentino (1797); his descriptions were published by Robillard-Péronville in Le Musée français;  In 1803 he was made professor of archaeology at the Institut de France. In Paris he published a series of portraits of famous men of Antiquity: Iconographie Grecque, 3 vols.
He held a prominent position as curator of antiquities at the Musée Napoleon housed in the Louvre Museum by the end of 1799; many items were previously obtained under the Treaty of Tolentino (1797); his accounts were published by Robillard-Péronville in Le Musée français; In 1803, he was appointed professor of archaeology at the Institut de France. In Paris, he produced a collection of portraits of famous ancient individuals: Iconographie Grecque, 3 volumes.