The Bononia fort stretched over an area of 200 decares from the modern city center to the Baba Vida fortess. Its walls are 2.70 to 3 meters thick and the diameter of one of the towers is 8-30 meters.
Inside tower number 8, archaeologists found coins and ceramics which show that Bononia was built in the 20-30's of the fourth century.
“This was a massive fortress system - the largest one to be discovered along the Lower Danube,” Dimitrov explained.
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