This is the 7468th most frequent Russian word.
дания
"Дания" in English means "Denmark."
In this sentence, 'Дания' is used as a proper noun referring to the country Denmark.
Государство Дания находится на Скандинавском полуострове.
The country Denmark is located on the Scandinavian Peninsula.
Here, 'Дании' is the genitive form of 'Дания', showing possession or relation to Denmark.
На фотографии изображены старинные здания Дании.
The photograph depicts ancient buildings of Denmark.
In the sentence, 'Дании' in genitive case helps to describe that the history belongs to Denmark.