This is the 18182nd most frequent Russian word.
цитадели
"Цитадели" translates to "citadels," meaning fortified strongholds or central parts of a fortress.
Here, 'цитадели' is used to refer to fortified parts of ancient cities, describing a historical attraction.
Цитадели древних городов привлекают туристов своей богатой историей.
The citadels of ancient cities attract tourists with their rich history.
Here, 'цитадели' represents a singular architectural structure being analyzed in an academic context.
Студенты изучали архитектуру цитадели, чтобы понять её защитные функции.
The students studied the architecture of the citadel to understand its defensive functions.
In this metaphorical usage, 'цитадели' refers not to physical fortresses but to centers of knowledge and learning.