From this time on the new style was in general use for church designs. _L. B. Alberti_ (1404-73), who had in Rome mastered classic details more thoroughly than Brunelleschi, remodelled the church of +S. Francesco+ at +Rimini+ with Roman pilasters and arches, and with engaged orders in the façade, which, however, was never completed. His great work was the church of +S. Andrea+ at +Mantua+, a Latin cross in plan, with a dome at the intersection (the present high dome dating however, only from the 18th century) and a façade to which the conception of a Roman triumphal arch was skilfully adapted. His façade of incrusted marbles for the church of S. M. Novella at Florence was a less successful work, though its flaring consoles over the side aisles established an unfortunate precedent frequently imitated in later churches. [Illustration: FIG. 160.--EXTERIOR OF DOME OF DUOMO, FLORENCE.] [Illustration: FIG. 161.--INTERIOR OF S. SPIRITO, FLORENCE.] A great activity in church-building marked the period between 1475 and 1490. The plans of the churches erected about this time throughout north Italy display an interesting variety of arrangements, in nearly all of which the dome is combined with the three-aisled cruciform plan, either as a central feature at the crossing or as a domical vault over each bay. Bologna and Ferrara possess a number of churches of this kind. Occasionally the basilican arrangement was followed, with columnar arcades separating the aisles. More often, however, the pier-arches were of the Roman type, with engaged columns or pilasters between them. The interiors, presumably intended to receive painted decorations, were in most cases somewhat bare of ornament, pleasing rather by happy proportions and effective vaulting or rich flat ceilings, panelled, painted and gilded, than by elaborate architectural detail. A similar scantiness of ornament is to be remarked in the exteriors, excepting the façades, which were sometimes highly ornate; the doorways, with columns, pediments, sculpture and carving, receiving especial attention. High external domes did not come into general use until the next period. In Milan, Pavia, and some other Lombard cities, the internal cupola over the crossing was, however, covered externally by a lofty structure in diminishing stages, like that of the Certosa at Pavia (Fig. 152), or that erected by Bramante for the church of S. M. delle Grazie at Milan. At Prato, in the church of the +Madonna delle Carceri+ (1495-1516), by _Giuliano da S. Gallo_, the type of the Pazzi chapel reappears in a larger scale; the plan is cruciform, with equal or nearly equal arms covered by barrel vaults, at whose intersection rises a dome of moderate height on pendentives. This charming edifice, with its unfinished exterior of white marble, its simple and dignified lines, and internal embellishments in della-Robbia ware, is one of the masterpieces of the period.