Roybet, whose painting is characterised by a highly firmness brushwork, often shows portraits in glittering silk costumes, inspired from the end of the sixteenth century to the eighteenth century. He transposes contemporary men and women in the past time, considered as a golden period, and invested by the prestige of History. The artist mostly excels in the representation of musketeers and people of the Court from the eighteenth century. His canvas were a great success with the public of Salons. Together with portraits, he produced numerous scenes of genre or historical reconstitutions. The technical virtuosity of Roybet, as well as his sense of adornment and his generous and strong touch, related him to Rubens and the Flemish school. With his taste for history, his noble interpretation of current scenes and his passion for Flemish masters of the seventeenth century, of which he had assimilated the technique in an amazing way, Roybet totally embraces the aesthetic expectations of the society of its time. His work is enormous. Beside, he collected numerous works of art, turning his studio into a real museum of medieval art, his favourite period, although his painting subjects mostly correspond to seventeenth century. A museum is devoted to his work in Courbevoie.