What is citadels?

A citadel is a fortified structure or complex that often served as a stronghold for a city or region. Citadels were designed to protect against attacks from enemies and to serve as a refuge for residents during times of conflict. They were typically located in strategic locations such as hills, cliffs, or riverbanks and usually consisted of walls, towers, gates, and a barracks.

Citadels have been used throughout history, from ancient times to the present day. Some examples of famous citadels include the Acropolis in Athens, Greece, the Alhambra in Granada, Spain, and the Red Fort in Delhi, India. Other well-known citadels include the Tower of London in England and the Citadel of Hue in Vietnam.

In modern times, citadels have become less common as military technology has evolved, but some still exist and are used for military purposes. Many old citadels have been repurposed and turned into museums, government buildings, or tourist attractions.