It is surrounded by a thick earthen wall, nearly 4 m.
It is a very old town, with high earthen walls and twelve gates, commanded by a fort.
Ceramic pots are made of earthen material.
It was probably suggested to Ctesibius by the Egyptian Wheel or Noria, which was common at that time, and which was a kind of chain pump, consisting of a number of earthen pots carried round by a wheel.
Rude earthen or stockaded forts, serving as magazines and places of retreat, were erected; or in some cases use was made of strongholds already existing, such as Dun Almain in Kildare, Dunlavin in Wicklow and Fermoy in Cork.