👉 Citadels, also known as fortresses or moats, are defensive structures used by states to protect their territories from invaders. They were originally constructed as defense against invasions and later served as a means of maintaining economic stability and control over strategic locations. Cidemies, for example, are the citadels of ancient Rome and Greece. These massive walls and fortifications provided a solid barrier against external threats such as invading armies or pirates. The Romans also built several citadels in their
