Citadels are often found in historical or tourist sites, signifying past military importance. The tour includes a visit to the citadel, an iconic medieval fortress.
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Visual Prominence
Citadels are usually located on high ground, with clear visibility over the surroundings. From the town square, you could see the citadel dominating the skyline.
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Military Origin
The primary purpose of a citadel is military defense, so it's often associated with battles. The citadel withstood numerous attacks throughout history.