This entrance is one of the best known features of the cathedral, so it will be interesting to quote the words of a few great authorities concerning it. Fergusson, speaking of the cathedral in his "Illustrated Handbook of Architecture," says: "Its western doorway, which remains intact, is a fair specimen of the rich mode of decoration so prevalent in that age. It must be considered rather as a continental than as an English example. Had it been executed by native artists we should not entirely miss the billet moulding which was so favourite a mode of decoration with all the nations of the north." Kugler, the great art historian, also thinks it continental in style, and compares it with the architecture of the south-west of France. We even find it spoken of, on account of the richness of its ornamentation, as Saracenic in character. The late Prof. Freeman, in his "History of Architecture," is liberal with his praise, and probably all Roffensians, at any rate, will agree with him, when, in speaking of Norman doors with tympana, he says: "the superb western portal at Rochester Cathedral is by far the finest example of this kind, if not the finest of all Norman doorways." The doorway is structurally interesting, as we have therein exemplified a curious mode of forming a straight head over an aperture. The arches of course bear all the weight of the super-structure, but the straight band of masonry on which the figures of the Apostles are carved has to support both itself and the stonework of the tympanum. The method by which it is enabled to do this is as follows: the stones, the joints being vertical, are locked into one another by semicircular ridges fitting into corresponding indentations. Mr. Smirke, writing on aperture heads in "Archaeologia," vol. xxvii., said that he thought these excrescences, or in masons' language, "joggles," insufficient for security, and suggested that perhaps inside, out of sight, the joints radiate like those of a skeme arch. He also commented on the irregularity of the stones used here and throughout the whole front. Another fact worthy of remark is that the semicircular arches of the doorway are struck from slightly different centres.