Cl. Alain Lonchampt © CNMHS, Paris.   
View of the east facade of the Roman wall with the Saint-Sernin Tower in the right foreground.
Reconstitution : Ecole d'architecture de Charenton
 his is a horseshoe shaped Gallo-Roman tower on the eastern face of the fortification. The bond is typical of Late Empire masonry, with alternating rows of small sandstone blocks and regular layers of brick. The tower originally had roman arch windows. The masonry bosses at the top of these arches clearly attest to the work of the royal engineers who fortified the ancient curtain walls with crenellated parapets at the end of the XIIIth Century.
The tower served as the nave of Saint-Sernin Church which was built against the rampart in the XIIIth Century and destroyed during the French Revolution. In the XVth Century a large tracery window was made in the ancient stonework.


 Late Empire Wall
 The St-Sernin Tower
 The Moulin, Connétable,
 Vieulas, and
 Marquière Towers
 The Avar Postern
  The St-Sernin Tower.
  Photo Nader Boutros