In Iceland it was 216,000 Roman feet (about 64 km).

How could a huge force like his go down in a battle against four legions of Roman foot?

The height of the outer wall is 48 meters (157 ft / 165 Roman feet).

Our unknown architect apparently began with the idea of building an arena measuring 300 x 180 Roman feet.

The outer wall is 48 meters (157 ft / 165 Roman feet) high.

The distance around the building was 545 meters (1,788 ft / 1,835 Roman feet).

He is very long, more than two Roman feet.

The length of the Roman foot has been estimated at 296 mm or 11.65 inches.

All arches have the same diameter of 20 Roman feet (5.9m) with a variation of 15 cm.

The distance between centres of the pillars is 26 Roman feet (7.95m).