[7] On this point see Kraus, Geschichte der christlichen Kunst, Vol. I, pp. 41, 46 et seq. Muther, Geschichte der Malerei, Vol. I, p. 13. Woltmann and Woermann, History of Painting, Vol. I. pp. 151-156. Paul Lacroix, Les Arts au Moyen Age et à l'Epoque de la Renaissance (Ed. 1877, Paris), p. 254.
[8] See J. A. Crowe and G. B. Cavalcaselle, The History of Painting in Italy (Ed. 1903), Vol. I, p. 4. Woltmann and Woermann, op. cit., Vol. I, p. 156.
[9] Woltmann and Woermann, op. cit., Vol. I, p. 156.
[10] J. A. Crowe and G. B. Cavalcaselle, op. cit., pp. 14, 15.
[11] For a discussion of the material causes of the change of type, see Milman, op. cit.. Vol. IX, p. 324.
[12] Crowe and Cavalcaselle, op. cit., Vol. I, pp. 24, 25.
[13] Woltmann and Woermann, op. cit., Vol. I, p. 185.
[14] Woltmann and Woermann, op. cit., Vol. I, p. 230.
[15] See an interesting discussion on the early Christian attitude towards art in Kraus, Geschichte der christlichen Kunst, Vol. I, pp. 58 et seq. See also Milman's conclusions on the subject, History of Latin Christianity, Vol. II, pp. 345, 346.