This is the 12293rd most frequent Russian word.
историческим
"Историческим" means "historical" or "relating to history" in English.
In this sentence, 'историческим' describes the importance of the event in history.
Это событие было историческим переломным моментом.
This event was a historic turning point.
Here, 'историческими' refers to monuments related to historical events or periods.
Я посетил город с многими историческими памятниками.
I visited a city with many historical monuments.
In this sentence, 'историческим' emphasizes the building's association with important historical events.