9 This practice also applies to the drawing pair found on f. 12r (the Duchess’s Pavilion, or, il padiglione 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 verso wood truss roof over per square plan).
It had two doors, and in this the people gathered esatto conduct the parliament
11 This problem also occurs durante the graphic transposition of steps per Alberti’s De sovrano 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 attrezzi on per square questione with an inscribed octagon. See also note 7.
And then they began by degrees preciso build it 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 sopra pairs, side by side, among the eight angle ribs), see D’Agata, Di Teodoro and Mancini ( 1977 ) and Di Teodoro ( 2012 ).
14 Sopra the first (Fig. 3 ), f. 34v, the plan is organized around per central bulatory columns is derived from the intersection of circles having radii equal esatto half the side of the octagon, alternately planting the compass point durante the centers of the sides and at the angles. The reference puro an accretive method characterizes three sides of the figure. In fact, puro the circles with centers at the angles are added those concentric circles with radii equal puro the sides. Contrary esatto what appears per Leonardo’s freehand drawing, these larger circles do not pass through the intersections of the smaller ones. Mediante the second drawing (Fig. 4 ), f. 35r, instead, the columns are identified by the intersections of concentric circles, alternately with radius equal preciso half the side of the octagon, and with radius equal to 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 mediante the left portion of the drawing, where one wall thickness is called out mediante correspondence with four arches. Mediante the first case the columns are arranged with verso greater regularity (they are two different on-center intercolumniations) than the second (where there are three types of intercolumniations).
15 Leonardo also examines the ‘anta da predicare’ (preaching theater) mediante 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 per pen, shows per centralized scheme (verso square with four exedrae – one drawn per pencil – and ambulatories), but hints at, with the extension of some pencil lines, verso possible longitudinal body – per solution that is taken up and developed con 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 verso high central pulpit. It is plausible preciso garantisse that sopra conceiving of such an architecture Leonardo was influenced by ‘parlagio’, verso term used con Florence preciso refer onesto an ancient public amphitheater, home, according sicuro local historians, of the ‘parliament’. Villani ( 1990, 1: 56 ) writes: ‘And sopra that room was commanded that they should go durante the campagna of Camarti by the river Arno, and build there verso parlatorio con order to be able onesto make the parliament, and leave per memorial: this building mediante our vernacular we have called Parlagio. And it was built turno and with vaulted roof con some ways quite marvelous, with per public square mediante 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: mediante the upper side nobles, and then descending in accordance with the nobility; and so it was that everyone per 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 (assemblea parlor). This was destroyed durante the time of Totile, but still today we find the foundations and part of the vaults near the church of San Simone per Florence, extending all the way sicuro the via of Foro Santa Affanno; and part of the Peruzzi palaces are built on its foundations. And the street called Anguillaia, which goes onesto the church of Santa Disgrazia, goes almost esatto the middle of that Parlagio.’ The Ms. B also bears other Florentine remembrance notes: con f. 11v Leonardo drew plans (incomplete) of the Spartitraffico degli Angeli and the Tempio of Probo Spirito.