An Italian violinist, Balthasar de Beaujoyeulx (ca. 1535-1587) came to the French court in 1555 as Catherine de' Medici's valet de chamber (chamber valet, or personal servant). In 1573 he arranged Le Ballet des Polonais, but his claim to fame rests with his 1581 masterwork, Le Ballet-Comique de la Reine. In the libretto for the ballet he explained the terms ballet and comique. Beaujoyeulx defined ballet as people creating geometric formations as they danced, which was an important step in developing choreographic precepts. In the Ballet-Comique, Beaujoyeulx skillfully combined elements from court amusements, music, poetry, scenery, machinery, and lavish costumes in a production that was to be copied throughout Europe.