This is the 11582nd most frequent Polish word.
katolickiej
"Katolickiej" means "Catholic" (related to the Catholic Church) in English.
In this sentence, 'katolickiej' is an adjective modifying 'uczelni', indicating the university's affiliation.
To jest biblioteka katolickiej uczelni.
This is the library of a Catholic university.
Here, 'katolickiej' serves as an adjective describing 'prasy', showing the type of press.
Znam wiele publikacji katolickiej prasy.
I am familiar with many publications of Catholic press.
In this sentence, 'katolickiej' is used to describe 'organizacji', referring to its nature or character.