( fl Paris, 1298; d ?Paris, c. 1316). French goldsmith. He is documented principally in the royal accounts of Philip IV, but no authenticated work by him survives. His atelier was on the Grand Pont in Paris, and his sons may also have been active there because they became proprietors after his death. In 1298 he was paid for a reliquary of St Louis (destr. after 1392) for the Sainte-Chapelle, Paris. Payments for the head reliquary of St Louis (destr. 1791) began the following year. The frontispiece engraving to Du Cange’s edition of Jean de Joinville’s Histoire de S Louys IX (1688), the only visual record of a work by Guillaume Julien to survive, shows the crowned and jewelled bust of repoussé gold only to the shoulders. Inventory descriptions show, however, that it was supported by four silver-gilt angels, holding attributes and standing on a base decorated with rosettes framing images of the 32 kings of France from Clovis to Philip IV. Champlevé inscriptions recorded their names at the top and Philip’s gift and Julien’s work at the bottom. The orphrey of the Saint was embellished with flowers formed of gems and émaux de plique. Guillaume Julien also restored objects at the Sainte-Chapelle and created many luxury items for Philip IV, including 28 fruit plates, spice and sauce dishes and other unspecified objects.