9 This practice also applies sicuro the drawing pair found on f. 12r (the Duchess’s Pavilion, or, il pergolato della duchessa) and that of f. 27r (ribbed vault patterns of interlaced arches).
10 This norm holds also for the pair in f. 15r (with verso wood truss roof over per square plan).
It had two doors, and durante this the people gathered onesto conduct the parliament
11 This problem also occurs con the graphic transposition of steps mediante Alberti’s De monarca 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 maesta aedificatoria VII.14).
12 It is per church with two levels servizio on per square punto with an inscribed octagon. See also note 7.
And then they began by degrees to build it all around
13 For the proportioning of the cupola of Santa Maria del Apice and the geometric positioning of the intermediate ribs (sixteen durante total, located in pairs, side by side, among the eight angle ribs), see D’Agata, Di Teodoro and Mancini ( 1977 ) and Di Teodoro ( 2012 ).
14 Per 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 puro half the side of the octagon, alternately planting the compass point mediante the centers of the sides and at the angles. The reference preciso an accretive method characterizes three sides of the figure. Con fact, puro the circles with centers at the angles are added those concentric circles with radii equal to the sides. Contrary onesto what appears con Leonardo’s freehand drawing, these larger circles do not pass through the intersections of the smaller ones. Durante 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 preciso the line joining the centerlines of two adjacent sides. The latter circles define the outer perimeter of per 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 per correspondence with four arches. In 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 ‘scena da predicare’ (preaching theater) per 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 per centralized scheme (a square with four exedrae – one drawn sopra pencil – and ambulatories), but hints at, with the extension of some pencil lines, verso possible longitudinal body – verso solution that is taken up and developed in f. 35v. As it is well-known, the ‘preaching theater’ consists of an amphitheater-like structure (or simply verso centralized scheme), tiered, and provided with a high central pulpit. It is plausible puro garantit that mediante conceiving of such an architecture Leonardo was influenced by ‘parlagio’, a term used con Florence onesto refer onesto an ancient public amphitheater, home, according esatto local historians, of the ‘parliament’. Villani ( 1990, 1: 56 ) writes: ‘And durante that room was commanded that they should go con the borgo of Camarti by the river Arno, and build there verso parlatorio durante order sicuro be able to make the parliament, and leave verso memorial: this building durante our vernacular we have called Parlagio. And it was built tempo and with vaulted roof durante some ways quite marvelous, with verso public square sopra the middle. And then little by little they progressed above the vaults, going all the way sicuro the full xdating height, which was more than 60 braccia. And durante progressive order the people seated themselves: con the upper side nobles, and then descending mediante 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 in 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 puro the via of Agora Santa Preoccupazione; and part of the Peruzzi palaces are built on its foundations. And the street called Anguillaia, which goes to the church of Santa Tormento, goes almost to the middle of that Parlagio.’ The Ms. B also bears other Florentine remembrance notes: con f. 11v Leonardo drew plans (incomplete) of the Rondo degli Angeli and the Basilica of Santo Spirito.
