This is the 2732nd most frequent German word.
historischen
"Historischen" means "historical" in English.
Here, 'historischen' is used as an adjective describing 'Bauwerke' (buildings), indicating that these buildings have historical significance or originate from the past.
Die Stadt hat viele historischen Bauwerke.
The city has many historical buildings.
In this sentence, 'historischen' is an adjective describing 'Moment' (moment), emphasizing that the event was significant and noteworthy in history.
In einem historischen Moment unterzeichneten die Staatsführer den Friedensvertrag.
In a historical moment, the state leaders signed the peace treaty.
'Historischen' is used to describe 'Dokumenten' (documents), indicating that these documents have importance or originate from particular historical periods.