This is the 7033rd most frequent Russian word.
барановичском
The word "барановичском" is the prepositional form of the adjective related to "Барановичи," a city in Belarus, meaning "in Baranovichi" or "pertaining to Baranovichi."
Here, 'барановичском' is used as an adjective to describe a specific geographical area, namely, the Baranovichi district.
Я родился в Барановичском районе.
I was born in the Baranovichi district.
In this sentence, 'барановичском' modifies 'музее' to denote that the museum is located in or associated with Baranovichi.
В Барановичском музее много интересных экспонатов.
The Baranovichi museum has many interesting exhibits.
Here, 'барановичском' is part of the name of a university, indicating its location and affiliation with Baranovichi.