Portrait of a Carthusian is a painting in oils on oak panel completed by the Early Netherlandish painter Petrus Christus in 1446. It is a three-quarter portrait of anonymous Carthusian monk gazing directly at the viewer. Towards the bottom of the painting is a trompe l’oeil fly, making it an early example of the technique. Regarded as a masterpiece of Early Netherlandish painting, it is held by the Metropolitan Museum of Art in New York City.Painting: Petrus Christus