Hi Believer
Don't look for logic with regard to articles in English.
Adjectival attributes very often bring on an indefinite article:
A new culture was born.A relative clause may do the same:
We need a culture that is totally different from what we have now.When an adjectival attribute refers to
a nation or
a historical period, zero article is usually used:
He takes an interest in Korean culture.
I don't like German literature.
Medieval music is very fascinating.The is used in such cases when the reference is to things not associated with culture:
The Swedish Army has not been engaged in a battle for 200 years.
How many fleets does the French Navy consist of?
The Finnish president attended the conference.CB