[ 795 ] 
The temple of Fortuna virilis. 
When this temple was built, is not known j but 
It is commonly thought, from the poornefs of the 
materials, and the ftyle of the architecture, to be 
one of the moft antient buildings now remaining in 
Rome. The great fimplicity of its parts, and their 
near agreement with each other, afford fo clear an 
evidence of the meafure by which it was conftruCted, 
that I have chofen to begin with it, as an introduction 
to the reft. 
It has four Ionic columns in front, and feven in 
depth. 
The depth, taken between the centers of the an- 
gular columns, is 54, feet 8^ inches Paris meafure, 
equal to 58264,06 thoufandth parts of the London 
foot; which contain juft 60 Roman feet of 971 -{- 
fuch parts each. 
The diftance between the centers of the columns 
in this range, is 9 feet i| inches, equal to 9710,6 
London parts ; containing 10 Roman feet of the fame 
meafure with the former. 
The extent of the front, taken between the centers 
of the angular columns, is 28 feet 83- inches, =. 
30556,25 j which contain 31-j Roman feet of 
970 -)- London parts each. 
The diftance between the centers of the angular 
columns, and thofe on each fide the entrance, is 
exaCtly equal to the diftance between the centers of 
the columns on the fides; being 10 Roman feet of 
971 + parts each. 
There remain therefore n- Roman feet, for the 
diftance between the centers of the columns on each 
Vo l, LI. 5 K fide 
