This edifice is inhabited [accessible] below and above, like San
Sepolcro, and it is the same above as below, except that the upper
story has the dome _c d_; and the [Footnote: The church of San
Sepolcro at Milan, founded in 1030 and repeatedly rebuilt after the
middle of the XVIth century, still stands over the crypt of the
original structure.] lower has the dome _a b_, and when you enter
into the crypt, you descend 10 steps, and when you mount into the
upper you ascend 20 steps, which, with 1/3 braccio for each, make 10
braccia, and this is the height between one floor of the church and
the other.

_Above the plan on the same sheet is a view of the exterior. By the
aid of these two figures and the description, sections of the
edifice may easily be reconstructed. But the section drawn on the
left side of the building seems not to be in keeping with the same
plan, notwithstanding the explanatory note written underneath it:
"dentro il difitio di sopra" (interior of the edifice
above)[Footnote 1: _The small inner dome corresponds to_ a b _on the
plan--it rises from the lower church into the upper-- above, and
larger, rises the dome_ c d. _The aisles above and below thus
correspond_ (e di sopra come di sotto, salvoche etc.). _The only
difference is, that in the section Leonardo has not taken the
trouble to make the form octagonal, but has merely sketched circular
lines in perspective._ J. P. R._].

_Before leaving this group, it is well to remark that the germ of it
seems already indicated by the diagonal lines in the plans Pl. LXXXV
No. 11 and No. 7. We shall find another application of the same type
to the Latin cross in Pl. XCVII No. 3.

_2. Churches formed on the plan of a Latin cross.

We find among Leonardo's studies several sketches for churches on
the plan of the Latin cross; we shall begin by describing them, and
shall add a few observations.

A. Studies after existing Monuments.

Pl. XCIV No. 2. (MS. B. 11b.) Plan of Santo Spirito at Florence, a
basilica built after the designs of Brunellesco.--Leonardo has added
the indication of a portico in front, either his own invention or
the reproduction of a now lost design.

Pl. XCV No. 2. Plan accompanied by the words: "A_ e santo sepolcro
di milano di sopra"(A _is the upper church of S. Sepolcro at Milan);
although since Leonardo's time considerably spoilt, it is still the
same in plan.

The second plan with its note: "B_ e la sua parte socto tera" (B _is
its subterranean part [the crypt]) still corresponds with the
present state of this part of the church as I have ascertained by
visiting the crypt with this plan. Excepting the addition of a few
insignificant walls, the state of this interesting part of the
church still conforms to Leonardo's sketch; but in the Vestibolo the
two columns near the entrance of the winding stairs are absent.

B. Designs or Studies.

PL. XCV No. 1. Plan of a church evidently suggested by that of San
Sepolcro at Milan. The central part has been added to on the
principle of the second type of Group III. Leonardo has placed the_
"coro" _(choir) in the centre._

_Pl. XCVI No. 2. In the plan the dome, as regards its interior,
belongs to the First Class of Group IV, and may be grouped with the
one in MS. B. 35a. The nave seems to be a development of the type
represented in Pl. XCV No. 2, B. by adding towers and two lateral
porticos[Footnote 1: Already published in Les projets primitifs Pl.
XLIII.].

On the left is a view of the exterior of the preceding plan. It is
accompanied by the following note:_