New York artist Joyce Kozloff discusses the inspiration for the Galla Placidia & Tobkapi Pullman mosaics. Two mosaics panels integrate local history with early moments in the history of Western art. In "Galla Placidia in Philadelphia." William Penn stands on a schematic hillside, holding the scrolled charter to the commonwealth of Pennsylvania. He functions as an historical referent and schematic visual symbol, for his silhouette is the primary civic icon of the city. Opposite the Penn mosaic stands "Topkapi Pullman," paying tribute to Philadelphia's role as a transportation and mercantile center. From inside Istanbul's Topkapi Palace, tiled with elaborate floral geometric motifs, a doorway opens up onto a massive, foreshortened locomotive speeding through a streamlined Precisionist space.