Character of Renaissance Architecture

by Charles Herbert Moore

Fig. 46.—Sant’Andrea di Ponte Molle.

The likeness extends farther. The return of the entablature along the side walls and the cornice of the attic are the same in both instances; but the second pediment in the Pantheon façade Vignola has not reproduced. St. Andrea is thus a close, though a modified, copy of the rectangular part of the Pantheon, with the rectangle elongated and surmounted by a dome designed on the Pantheon model. It was not known in the sixteenth century that the ancient monument is not a homogeneous structure, but an awkward patchwork, the result of successive alterations and additions.[83] Vignola took it entire as an example of that ancient style which he regarded as authoritative, and based his design for St. Andrea upon it, just as many modern architects have taken motives from Vignola himself. If it were proposed to erect a dome upon the Parthenon, few people would fail to see that the result would be an architectural monstrosity, yet this would not be very different from what was done in St. Andrea by an architect who has been looked upon as a champion of classic correctness in design.

M. Palustre has called attention to the fact that, in the interior of St. Andrea (Fig. [45]), the two parts of the entablature which have no _raison d’être_ under a vault have been omitted.[84] But the impropriety of a complete entablature in connection with vaulting is no greater than that of any part of a classic order, which has no justification in such connection, as we have already remarked.

The pilgrimage church of Santa Maria degli Angeli, built over the oratory of St. Francis at Assisi, is a more extensive monument which was begun by Vignola in the year 1569. Though completed by other architects, and extensively restored in 1832, the building as it now stands is uniform in style throughout, and bears the marks of Vignola’s manner of design. It is cruciform in plan, with a long nave and aisles, and a square chapel opening out of each bay of each aisle. The nave and transept have barrel vaulting, a half-dome covers the apse, and a dome on a high drum resting on pendentives rises over the crossing. The aisles have domical groined vaulting with transverse ribs, and the side chapels have barrel vaults with their axes perpendicular to that of the nave. These chapels thus form abutments to the inner vaulting, so that no external buttresses are needed. The entire fabric is of brick, but the details, including the orders of the interior, of the west front, and of the drum, are wrought in stucco. For the interior the architect has employed a great order of Doric pilasters, a single pilaster on the face of each pier, and on the sides of the piers, under the aisle archivolts, he has placed pairs of smaller pilasters. The soffits of the archivolts are very wide, and have each a pair of salient sub-archivolts corresponding with the pilasters. It had been common for the architects of the Roman Renaissance to break the entablature into ressauts over the columns or pilasters of the orders when used in this way, as San Gallo had done in Montepulciano and Michael Angelo in St. Peter’s. But the effect of thus breaking the continuity of the cornice line is unpleasing, and Vignola has avoided it here by confining the ressaut to the architrave, frieze, and bed-mouldings, leaving the corona of the cornice unbroken as in Figure 47. The great piers of the crossing show the influence of St. Peter’s in being splayed, and the forms of the pendentives lose their spherical surfaces in being fitted to the straight line of the splay, as they do in St. Peter’s. The design of the façade expresses with unusual truthfulness the divisions of the interior, which are marked by pilasters like those of the great order within, and by an arch coinciding with the curve of the vaulting.

Fig. 47.—Order of Santa Maria degli Angeli.

Fig. 48.—Plan of the Gesù.

The Gesù in Rome, another large church by Vignola, and built at about the same time as Santa Maria degli Angeli, is a variation of the same scheme, and shows in a more marked degree the influence of St. Peter’s. A plan of this building, the intended façade which Vignola did not live to construct, and the existing façade by Jacomo della Porta are given in the addendum to the edition of the architect’s book on the Five Orders published in 1617 already referred to (p. [84]), and are reproduced in Figures 48, 49, and 50. The aisles are omitted here so that the side chapels, which communicate with each other by narrow openings in the dividing walls, open directly out of the nave. The transept is short, and extends on either side beyond the nave only by the thickness of its walls. An elevated dome on pendentives, circular on plan within and octagonal on the outside, rises over the crossing, and barrel vaults cover the nave and transept arms. The side chapels are vaulted, with small domes on pendentives, except those in the angles of the crossing, which do not require pendentives because their supports are shaped to the circular form as shown in the plan, Figure 48. These supports are made heavier than the others in order to strengthen the crossing piers, which, in consequence of this reënforcement, do not need to advance so far into the space under the great dome as they otherwise would. In Santa Maria degli Angeli the aisles prevent this treatment, and the crossing piers extend far into the nave and narrow the spans of the crossing arches.