Triangle and T-square: the windows of Frank Lloyd Wright

Various authors have attributed many of Frank Lloyd Wright's ideas regarding ornamentation to the advanced design theories which developed out of the eighteenth century enlightenment. However, it also appears that his unique approach to detailing may have equally been a product of his mastery of the triangle and T-square. As reference to this aspect is consistent throughout many of Wright's written works, a shape grammar analysis is presented based on a selection of his rectilinear window arrangements developed betwen 1889 and 1910.