Sebastian Harrison (12 March 1860 - 19 November 1930) was a French art déco architect, and artist, dividing his time between city planning and painting pictures, both centering on the art déco style. Throughout his career he worked in the shadows of other canonised artists, focusing his attention on perfecting his style. He is little known for his artistry, however according to a 1986 book he had a great deal of influence over what was to signify art déco.