Caption:
Plan and elevations of a grand staircase with double ramps with vestibules, Floor plan and elevation of a double staircase with vestibule, tab. 88, after p. 208, Augustin-Charles d'Aviler, Vignola, Michelangelo, Leonhard Christoph Sturm, Hertel: Ausführliche Anleitung zu der gantzen Civil-Bau-Kunst [...]. Augspurg: bey Johann Georg Hertel, 1747