 When the republic fell the following year, together with his younger brother, , he moved to Paris where he soon gained the admiration of Talleyrand.They opened a new branch of the family enterprise there, called Piranesi Frères, which decorated a line of terracotta vases manufactured in imitation of the ancient Etruscan works by Joseph Bonaparte.In 1807 Pietro Piranesi sold his share of the firm and returned to Rome.