sentences:  His work has at times been dismissed as either reactionary and provincial, and indeed he was often held up by critics in the 19th century as a prime example of the barbarism perceived in late Byzantine painting.Given the lack of surviving dates, no chronology for his career has yet been created.Paintings by Margaritone are held at the National Gallery of Art in Washington, DC, and at the National Gallery, London; in addition, a number of works may be found at sites around Arezzo.