A History of Architecture in all Countries, Volume 1, 3rd ed. / From the Earliest Times to the Present Day

by James Fergusson

501. Part of the Flank of Cathedral at Florence.

502. Dome at Chiaravalle, near Milan. (From a drawing by Ed. Falkener, Esq.)

Externally the façade was never finished,[^[311]] and we can only fancy what was intended from the analogy of Siena and Orvieto. The flanks of the nave are without buttresses or pinnacles, and, with only a few insignificant windows, would be painfully flat except for a veneer of coloured marbles disposed in panels over the whole surface. For an interior or a pavement such a mode of decoration is admissible; but it is so unconstructive, so evidently a mere decoration, that it gives a weakness to the whole, and most unsatisfactory appearance to so large a building. This is much less apparent at the east end, where the outline is so broken, and the main lines of the construction so plainly marked, that the mere filling in is comparatively unimportant. This is the most meritorious part of the church, and, so far as it was carried up according to the original design, is extremely beautiful. Even the plainness and flatness of the nave serve as a foil to set off the varying outline of the choir. Above the line of the cornice of the side-aisles there is nothing that can be said to belong to the original design except the first division of the drum of the dome, which follows the lines of the clerestory. It has long been a question what Arnolfo originally intended, and especially how he meant to cover the great octagonal space in the centre. All knowledge of his intentions seems to have been lost within a century after his death: at least, in the accounts of the proceedings of the commission which resulted in the adoption of Brunelleschi’s design for the dome, no reference is made to any original design as then existing, and no one appears to have known how Arnolfo intended to finish his work. Judging from the structure as far as he carried it, and with the knowledge we now possess of the Italian architecture of that age, we can easily conjecture what his design for its completion may have been. Internally, it probably consisted of a dome something like the present, but flatter, springing from the cornice, 40 ft. lower than the present one, and pierced with large openings on each of its eight faces.

503. Section of Eastern portion of Church at Chiaravalle. (From Gruner’s ‘Terra Cotta Architecture in Italy.’) Scale 50 ft. to 1 in.

Externally, two courses were open to him. The first and most obvious was to hide the dome entirely under a wooden roof, as is done in St. George’s, Thessalonica (Woodcut No. [305]), or in the baptistery in front of the cathedral, and is done in half the baptisteries in Italy—as at Parma, for instance (Woodcut No. 514). Had he done this, the span of the dome might have been very much larger, without involving any constructive difficulties, and the three towers over the choir and transepts might have sufficed to relieve its external appearance sufficiently for architectural effect. On the whole, however, I am rather inclined to believe that something more ambitious than this was originally proposed, and that the design was more like that of Chiaravalle near Milan, built in 1221, and one of the most complete and perfect of this class of dome now existing in Italy. Its external appearance may be judged of from Woodcut [502], and its constructive details from the section, Woodcut No. [503].

If the basement is sufficiently solid—and that at Florence is more than sufficient for any superstructure of the sort—it is evident the architect can dispose of such masses of masonry, that he can counteract any thrust or tendency to spread that can exist in any dome of this sort; and instead of being only 136 ft. across, 150 or 160 might easily have been attempted. Instead of 375 ft., which is the height of the present dome from the floor to the top of the cross externally, it might even with the present diameter have been carried up to at least 500 ft., or as high as the church was long,—70 to 100 ft. above the height of St. Peter’s at Rome.

Had this been done, the three smaller semi-domes must have been intended to be crowned with miniature octagonal spires of the same class with the great dome, and between these the vast substructures show that it was intended to carry up four great spires, probably to a height of 400 ft.

Had all this been done (and something very like it seems certainly to have been intended), neither Cologne Cathedral, nor any church in Europe, ancient or modern, would have been comparable to this great and glorious apse. As it is, the plain, heavy, simple outlined dome of Brunelleschi acts like an extinguisher, crushing all the lower part of the composition, and both internally and externally destroying all harmony between the parts. It has deprived us of the only chance that ever existed of witnessing the effect of a great Gothic dome; not indeed such a dome as might with the same dimensions have been executed on this side of the Alps, but still in the spirit, and with much of the poetry, which gives such value to the conceptions of the builders in those days.