[170] Similar building-up of the arches may be seen in the nave at Bury (Fig. 22), and in the narthex of St. Leu d’Esserent (Oise). See Moore, p. 68 and p. 69, Fig. 24. [171] Very interesting examples occur also at Saint Aignan (Loire-et-Cher), Ch. [172] Similar angels are found in the porch of Santiago-de-Compostella illustrated in Uhde, Baudenkmaeler in Spainen und Portugal; also in Madrazo-Gurlitt, pl. 166. These latter are Angels of Judgment, forming part of the sculptural scheme of the three portals. [173] Similar figures also appear at Salamanca, in the old cathedral. See Street, p. 80 and Fig. opp. p. 80. Uhde, _op. cit._, Fig. 119, p. 50. [174] See p. 57. [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. [185] Ruprich-Robert, pl. LXXXVIII. [186] Ruprich-Robert, pl. LXXXVII. [187] Flying-buttresses had to be added not long after their construction, to keep them from falling. [188] Even these vaults have suffered from reconstruction in the thirteenth century. [189] See Moore, p. 130 et seq. for discussion of this point.