_Of the_ Vestibulum _or_ Entry.
The Houses of the Ancients had _Great_ and _Magnificent Entries_, they
were sometimes 15 Perches long and 9 broad, and they were supported upon
two ranks of Pillars, which made a Wing on each Side, the Proportion of
their breadth and length was taken three Ways. The first was, when
having divided the length into 5, 3 were allowed for the breadth. The
second was, when having divided it into 3, 2 were allowed for the
breadth. The third was, when having made an Equilateral Square, the
Diagonal of this Square was taken for the length, and the Side for the
breadth.
The height was equal to the length, taken from the Pavement below, to
the bottom of the _Plat-Fonds_ or _Flat-Roof_, which was hollowed on
the other side the Beams, the seventh part of the whole height.
The Proportion that the _Alley_ which was in the middle between the
Pillars, had with the Wings, was different according to the Magnitude of
the _Vestibule_ or _Entry_, for the greater they were or the lesser, the
Wings had a proportionable breadth with the _Alley_ in the middle; So
that if the _Vestibule_ or _Entry_ was 100 Foot long, the Wings had only
for their breadth the 50th. part of the length; and when it was but 30
Foot long, they had only the 3d. part.