Janssens, Janssen, or Jonson, Cornelis van Ceulen (kôrnāˈlĭs vän köˈlən yänˈsəns, –sən, –sôn) [key], 1593–c.1662, Dutch portrait painter who worked in England. He was the fashionable portrait painter of the English court from 1618 until the advent of Van Dyck. In 1643 Janssens moved to Holland. His portraits, one of which is in the Metropolitan Museum, are in many famous English collections.
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