Roman Amphitheatre of Uthina

Roman Amphitheatre of Uthina

The Roman Amphitheatre of Uthina is located in Uthina, near Tunis, Tunisia.  Building for Uthina began in 40 BC and continued through to 135 AD.

The amphitheatre may have been a later addition to what was already a large town.  Also located there were a fortress, cisterns, an aqueduct, a triumphal arch, a theatre, and a basilica with a circular crypt.


Coordinates
36.608598,10.169214


Description
The amphitheatre, partly buried, measures 113 by 90 meters. The arena measures 58 by 35 metres, giving surface areas of 7988 and 1539 square metres respectively.  There are four entrances, two main entrances at each end, with the seating area supported by three tiers of columns and arches. (Although these are no longer there, measurements and amphitheater descriptions rely on a complete building.)

Measurements for the amphitheatre on site are 120 by 89 metres, with the arena measuring 67 by 36 metres. The surface areas measure 10680 and 2412 square metres respectively.

Roman Units
The Roman cubit (cubitum) was 1½ Roman feet (17.48 inches)
Five Roman feet made the pace (passus), 1.48 metres (58.23 inches).

Analysis
The amphitheater aligns 31° northeast.  The ratio of the two sets of numbers are 5.18 or 4.43.
7988 ÷ 1540 = 5.18
8388 ÷ 1894 = 4.43

113 by 90/58 by 35
120 by 89/67 by 36
When considering the Roman foot, whose length is 0.296 m, the following produce a ratio when multiplied by ten, of approximately 20, 22.5 and 19.27;
(1)(feet)
382 by 304 / 196 by 118. 
91206 and 18165.
18165 ÷ 91206 ≈ 0.2
91206÷18165=5.02
√(18165) ≈ 135;
√(91206) ≈ 302.

(2)(Roman foot)
405 by 300 / 226 by 121
95425 and 21478
21478 ÷ 95425 = 0.225
95425÷21478=4.443
√(21478) ≈ 147
√(95425) ≈ 309

(3)(official)
113 by 90 / 58 by 35
7988 and 1540
1540 ÷ 7988 = 0.192
7988 ÷ 1540 = 5.18
√(1540) = 39.24
√(7988) = 89.37



Conclusion
When calculating the above numbers in feet/metres, Roman feet/metres, and on-site measurements in metres, the on-site measurements produce two ratios that, when subtracted from tilt, produce obliquity. Tilt is sometimes considered 23.5°, but accurately, it was 23.253° in 1985.
19.27 + 5.18 = 24.45
24.45 − 23.25 = 1.2
24.45 − 23.50 = 0.95

The official numbers from the site produce a ratio of 5.18, a number from the Pantheon in Rome, and 0.192, which, when multiplied by ten, equals 1.92. This is very near to a 1.91 cubits per metre measurement.

This suggests the on-site measurements, taken in metres, are correct, with a connection to Rome and Egypt. The use of the Egyptian cubit and other such measurements lasted for a short time after the victory in 31 BC to perhaps 80 AD. This suggests the amphitheatre was built around 20-30 BC. Further additions may have been added later.

Further measurements could connect to the Moon's angle of 28.6° or the golden ratio, 1.618. This 5.18 number could also be the Moon's inclination angle.  The 28.6° equals 28° 36' 0" and is the current inclination. A tilt of 23.45°, as some sources state, would make the other number one.
This might suggest something like "both ratios minus the tilt equal one". The ratios are inclination and a royal cubit.

Uthina (no changes)



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