[175] Other examples include: Bologna, San Petronio, ill. in Joseph, p. 172, Fig. 132; Verona, Cath. See Bond, p. 321; Pavia, San Teodoro (1150-1180), see Bond, p. 321; Venice, SS. Giovanni e Paolo, Cummings, II. p. 192.
[176] See also Rivolta d’Adda—Rivoira, I. p 234, Fig. 331; Pavia, S. Michele, Porter, I, ill. 104, opp. p. 204.
[177] See pp. 39 and 42.
[178] Omitting for the present the cathedral of Durham.
[179] These windows like others of the Norman school are actually to one side of the center of the bay but not far enough to make the difference apparent. In fact, they would seem to have been moved over for the purpose of making them appear in the center since the inward curve of the diagonal, which lies on one side of them only, would make them appear to be out of center were they placed on the axis of the bay.
[180] Enlart gives several examples, though not in churches with a regular pier system. Among these are: Cerisy-la-Forêt (Manche), Enlart, I, p. 261, Fig. 97; Le Mans, N. D. du Pré (original state); Villemagne (Hérault), Saint Gregoire (ruined), see Enlart, I, p. 264, note 2.
[181] Illustrated in Ruprich-Robert, pl. LXXIX.
[182] Ruprich-Robert, pl. LXXVIII.
[183] Ruprich-Robert, pl. LXXXI.
[184] In England, where thick walls are an important factor in vault support even at a comparatively late date, this same form of vaulting conoid is frequently found, for example in Chichester, Cath. (ill. in Moore, Mediaeval Church Architecture of England, p. 110, Fig. 91), Worcester, Cath. choir, (ill. in Moore, Mediaeval Church Architecture of England, pl. XX), Lincoln, Cath., E. Transept (see Moore, Mediaeval Church Architecture of England, p. 116), etc.