9 This practice also applies sicuro the drawing pair found on f. 12r (the Duchess’s Pavilion, or, il pergola della duchessa) and that of f. 27r (ribbed vault patterns of interlaced arches).
10 This norm holds also for the pair sopra f. 15r (with a wood truss roof over verso square plan).
It had two doors, and durante this the people gathered preciso conduct the parliament
11 This problem also occurs mediante the graphic transposition of steps in Alberti’s De re aedificatoria. Consider, for example, the proportions of the three planimetric typologies for basilicas (simple, with causidica, and double-doored) that do not take into account the wall thickness (Alberti, De regnante aedificatoria VII.14).
12 It is verso church with two levels batteria on a square punto with an inscribed octagon. See also note 7.
And then they began by degrees sicuro build it visitatori alt all around
13 For the proportioning of the cupola of Santa Maria del Raccolta and the geometric positioning of the intermediate ribs (sixteen durante total, located per pairs, side by side, among the eight angle ribs), see D’Agata, Di Teodoro and Mancini ( 1977 ) and Di Teodoro ( 2012 ).
14 Durante the first (Fig. 3 ), f. 34v, the plan is organized around verso central bulatory columns is derived from the intersection of circles having radii equal to half the side of the octagon, alternately planting the compass point mediante the centers of the sides and at the angles. The reference to an accretive method characterizes three sides of the figure. Durante fact, to the circles with centers at the angles are added those concentric circles with radii equal puro the sides. Contrary puro what appears per Leonardo’s freehand drawing, these larger circles do not pass through the intersections of the smaller ones. In the second drawing (Fig. 4 ), f. 35r, instead, the columns are identified by the intersections of concentric circles, alternately with radius equal onesto half the side of the octagon, and with radius equal puro the line joining the centerlines of two adjacent sides. The latter circles define the outer perimeter of a centralized building of eight lobes buttressed (or articulated with pilasters), as shown durante the left portion of the drawing, where one wall thickness is called out per correspondence with four arches. Durante the first case the columns are arranged with a greater regularity (they are two different on-center intercolumniations) than the second (where there are three types of intercolumniations).
15 Leonardo also examines the ‘notorieta da predicare’ (preaching theater) durante f. 55r of Ms. B (‘theaters for saying mass’) and f. 95r of the same codex (‘place for preaching’). The design of f. 55r, on the other hand, executed mediante pen, shows a centralized scheme (verso square with four exedrae – one drawn per pencil – and ambulatories), but hints at, with the extension of some pencil lines, a possible longitudinal body – verso solution that is taken up and developed durante f. 35v. As it is well-known, the ‘preaching theater’ consists of an amphitheater-like structure (or simply a centralized scheme), tiered, and provided with per high central pulpit. It is plausible esatto assume that in conceiving of such an architecture Leonardo was influenced by ‘parlagio’, verso term used sopra Florence sicuro refer esatto an ancient public amphitheater, home, according sicuro local historians, of the ‘parliament’. Villani ( 1990, 1: 56 ) writes: ‘And in that room was commanded that they should go per the borgo of Camarti by the river Arno, and build there verso parlatorio sopra order onesto be able puro make the parliament, and leave a memorial: this building sopra our vernacular we have called Parlagio. And it was built ripresa and with vaulted roof mediante some ways quite marvelous, with a public square durante the middle. And then little by little they progressed above the vaults, going all the way to the full height, which was more than 60 braccia. And mediante progressive order the people seated themselves: per the upper side nobles, and then descending durante accordance with the nobility; and so it was that everyone con the parliament saw one another face onesto face. And all could hear clearly that which was spoken; and it contained easily an endless multitude of people; and the correct name for this place was the parlatorio (meeting parlor). This was destroyed mediante the time of Totile, but still today we find the foundations and part of the vaults near the church of San Simone mediante Florence, extending all the way esatto the start of Agora Santa Croce; and part of the Peruzzi palaces are built on its foundations. And the street called Anguillaia, which goes preciso the church of Santa Afflizione, goes almost to the middle of that Parlagio.’ The Ms. B also bears other Florentine remembrance notes: mediante f. 11v Leonardo drew plans (incomplete) of the Rotonda degli Angeli and the Abbazia of Consacrato Temperamento.
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