Carcassonne History (contin) by Kuznetsov_Sergey
Then the art of fortificate constructions achieved its peak. The top city became practically unapproachable. The internal ring of fortifications has in perimeter of 1100 meters. An external ring - 1500 meters. The city garrison made 1300 persons, proceeding from following calculation: one person at each meter of an internal fortification, 20 person at each of 13 towers and 200 person at a gate. The population of the city at that moment was about 4 thousand persons.
