[ 8i6 ] 
are each of one block. The former meafures 56 Feet 
n T 7 ^ inches, = 60708,3 — , which contain 63 Ho- 
man feet of <>6 $, 6 parts each. The latter meafures 
26 feet 1 inches, = 28699,22, which contain 
2Qj fuch feet of 964,7 parts. The whole column, 
with the bafe and capital, meafures 32 feet 6 ~ inches, 
= 34669,9 London parts, which contain 36 Roman 
feet of 963 parts each. 
It appears by the infcription on the architrave of 
the portico of the Pantheon (8), that Severus repaired 
that temple ; and Defgodetz obfcrves, that the pave- 
ment is not fo old as the building. That it was laid 
by Severus is probable, from the corredtnefs of its 
meafures, which is a remarkable charadteriftic of the 
workmanfhip of that age. The fquare compartments 
on this pavement anfwer to 10 Roman feet, of 
964,78 parts, agreeing with a mean from the depth 
of the folid of this arch, and the widths of the en- 
trances, which are the moft unexceptionable mea- 
fures in it. The breadth of the ftrait bands between 
thefe compartments, is equal to the meafure Defgo- 
detz has given of the diameters of the columns of this 
arch, and anfwers to 3 feeet of 961,8 parts. But 
thefe bands might be purpofely made fomewhat fhort 
of the full meafure, to leave room for one of the 
fame breadth with the reft between the outermoft 
compartments and the circular range ,} for notwith- 
ftanding this, the workmen found themfelves obliged 
to diminifh both the outermoft compartment, and 
the band beyond it. 
(8) Imp. Caef. Septimius Severus et Imp. C<ef. M. Aurelius 
Antoninus Pantheum vetuftate corruptum cum omni cultu 
retfituerunt. 
The 
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