English: Plate 4 from: Willis, Robert (1835) Remarks on the architecture of the middle ages, especially of Italy, Cambridge: J & J.J. Deighton . Caption: Plate IV. Fig. 1 One compartment of the nave of S. Ambrogio, Milan.

Fig. 2. The upper part of the nave in the Cathedral at Avignon. Fig. 3. The simplest form of a compound arch, (page 26.) Figs. 4 to 8. Various ways of placing shafts about arches. Fig. 4. has sub-shafts; Fig. 5. a bearing-shaft; Figs. 6 and 7. edge-shafts; Fig. 8. nook-shafts. Fig. 9. An arch from the apse of the Cathedral at Murano, near Venice. This has a sub-arch upon corbels, and is stilted. The whole is of brick-work. Fig. 10. A corbel table in terracotta, from a Chapel of S. Eustorgio, at Milan.

Fig. 11. A corbel table frcm Monza, near Milan.