He had the idea of assembling a collection of antique coins that would form an illustrated gallery of the sovereigns of Classical antiquity, as an informative work of curiosity. In 1611 he advised Henri IV to renew the tradition of Antiquity by issuing fine medals to celebrate public and private events of his reign, a propaganda program that was adopted with some consistency by Louis XIV.
He conceived of assembling a collection of antique coins that would serve as an illustrated gallery of the rulers of Classical antiquity, as a work of information and amusement. In 1611, he advised Henri IV to revive the tradition of Antiquity by issuing fine medals to commemorate public and private events of his reign, a propaganda campaign that was adopted with some consistency by Louis XIV.