[34] Choisy (Choisy, II, p. 201) thus accounts for the vaults, which would then be variants of Perigord domes, but the plan and supports of the pyramids suggest the influence of Le Puy. [35] Examples in France: Grenoble, Saint Laurent (crypt of the seventh or eighth century), Germigny, des-Prés (ninth century), etc. Examples in Italy: Milan, Sant’ Ambrogio (choir of the ninth century), Agliate, etc. [36] For illustrations of Romanesque churches and vaults, the reader is advised to consult Lasteyrie, Dehio and von Bezold, and Enlart. [37] See also Montmajour (Bouches-du-Rhône); Saint Martin-de-Londres (Hérault); Saint Pierre-de-Redes (Hérault); Mollèges (Bouches-du-Rhône), Saint Thomas. See Reber, pp. 337, Figs. 201-202. [38] Also Lérins (Alpes-Maritimes), Saint Honorat (portion). [39] Early examples: Saint Genou, choir (end of eleventh century), Saint Benoît-sur-Loire, choir (begun 1602), Nevers, Saint Étienne. [40] The double-aisled abbey church of Souvigny, which has a clerestory, might be cited as an exception to this statement, but judging from the narrowness of its inner aisles (Fig. 19) it would appear as if its nave had originally been deprived of direct light, and that the present clerestory must have been introduced with or without a vault above it, either before or at the time when the outer aisles were added. If so, it would not prove an exception to the rule. The present nave vault is an addition of a late Gothic period. [41] As in Saint Sernin at Toulouse. [42] Reber, p. 341, Fig. 205a, and Lasteyrie, p. 413, Fig. 431. [43] Reber, p. 342, Fig. 260a. See also, Abbaye de Fontfroide, Baudot and Perrault-Dabot, V, pl. 41. [44] Found also in St. Paul-Trois-Châteaux, Lasteyrie, p. 412, Fig. 429. [45] See pp. 13, 14. [46] Exs., Issoire (Puy-de-Dôme), Saint Paul, see Enlart, I, p. 269, Fig. 102, or Choisy II, p. 209. Toulouse (Haute-Garonne), Saint Sernin, see Choisy, II, p. 212. Culhat (Puy-de-Dôme), Ch. Lasteyrie, p. 250, Fig. 241. Parthenay-le-Vieux (Deux-Sèvres), Notre Dame, ill. in Choisy, I, p. 205, etc. [47] Enlart, I, p. 267, Fig. 100 and Lasteyrie, p. 413, Fig. 430. The clerestory at Vaison is hardly worthy of the name, for its windows are cut entirely _above_ the imposts of the vault, which is of pointed section, and therefore does not acquire thickness so rapidly as to render the windows too deep to admit a reasonable amount of light. The construction of such a clerestory consists merely in taking advantage of the pointed form of vaulting without presenting structural advances. Its windows are necessarily small and deep set and the system is not a satisfactory solution of the lighting problem. [48] Revoil, II, pl. XVIII. [49] Semicircular vaults were sometimes used, however. Example, Saint Paul-Trois Châteaux (Drome), Cath. (first half of the twelfth century), Lasteyrie, p. 412, Fig. 429, etc. [50] Choisy, II, p. 206, Fig. 14. [51] Enlart, I, p. 268, Fig. 101.