This is the 8802nd most frequent Polish word.
rymanowskim
"Rymanowskim" is the locative or instrumental form of "rymanowski," meaning "related to Rymanów," a town in Poland.
In this sentence, 'rymanowskim' describes the architectural style related to Rymanów, acting as an adjective.
Odwiedziliśmy pałac w rymanowskim stylu.
We visited the palace in the Rymanów style.
Here, 'rymanowskim' functions as an adjectival attribute to 'regionie', indicating the relationship to the geographical area.
Ta książka opowiada o życiu mieszkańców w rymanowskim regionie.
This book tells about the life of the inhabitants in the Rymanów region.
In this usage, 'rymanowskim' modifies 'tereny', describing characteristics of the territory linked to Rymanów.