Francis I. The retention of the rectilinear high panel-black chair, with or without storage under the seat, represents a medieval form which continued to be constructed throughout the 16th century (figure6-13). Known as a throne chair, one form had the following characteristics: a paneled base enclosed for storage, access to which was through a hinged seat; a square seat surface; armrests parallel with the floor and enclosed for storage, access to which was through a hinged seat; a square seat surface; armrests parallel with the floor and enclosed underneath ; and a tall paneled back in two stages separated by classic moldings, the lower panel of which was taller. The introduction of classic elements included the use of the pilaster for the stiles of the back and, in the larger back panel, the symmetrical arabesque in a complicated intertwining arrangement of plant and animal forms.