Tuesday, November 20, 2007

Roman Wall

Cymbalaria muralis (EN also NL-FR-DE)
by KuLeuven-Kortrijk.be/bioweb

EN: ivy-leaved toadflax - NL: muurleeuwebek
FR: cymbalaire - DE: Zymbelkraut

Campanula rotundifolia (EN also NL-FR-DE)
by KuLeuven-Kortrijk.be/bioweb

EN: harebell - NL: grasklokje
FR: campanule à feuilles rondes
DE: Rundblättrige Glockenblume

The original defensive Roman wall, dating from
the 2nd century,
still visible on more than 1,500 meters.

Atuatuca Tungrorum, capital of the civitas Tungrorum,
the actual Tongeren.
A city wall was built in the first years
of the 2nd century A.D. (A century after the work of Vitruvius).

It has a length of 4.544 meter
and a thickness of 2,10 meter (or 7 Roman feet).

The layout is rather irregular and follows the area of the city.
It is inforced by round towers on irregular distances
from each other.
These towers have a diameter of 9 meter.
The foundation of the wall is sligthly thicker with
a gradual transition to the wall proper.

The height must have been 5 à 6 meter.

This layout approaches the Vitruvian rules.
The construction on the other hand is totally different.
Here the wall is composed of an inner and an outer parement
of regular silex blocks,
filled in with silex
and other rubble joined together with mortar.

On the foundation of walls and the establishments of towns