[1] After his father's death, Biennais moved to Paris in 1788, where he initially engaged in commerce; he married but was widowed after a year.

[2][3] The first part of his career he dedicated mainly to goldsmithing, but after the end of the revolutionary period, he approached more to silverware, since gold and silver objects during the Napoleonic Empire could be worked and produced.

[2] In addition to all kinds of silverware, jewelry, porcelain, religious objects, various white weapons embellished with military decorations, he produced mahogany furniture, such as chests of drawers, consoles, coffee tables, toilets and beds.

[5] While Robert Joseph Auguste gave the best of his art in the period of Louis XVI, Biennais and Jean-Baptiste-Claude Odiot proved to be the most capable interpreters of the Napoleonic model.

[5] Biennais was responsible for the execution of the insignia of Napoleon's coronation ceremony on December 2, 1804: the sword, the laurel wreath, the great necklace of the legion of honor, the Grand-Septre, the ball of the world and the hand of justice.