This is the 8195th most frequent Polish word.
opactwie
"Opactwie" means "abbey" in English.
In this sentence, 'opactwie' is used as the locative form of 'opactwo', indicating the location where the paintings can be found.
W opactwie znajduje się wiele zabytkowych obrazów.
There are many historic paintings in the abbey.
Here, 'opactwie' is used to describe the location within the abbey where the activity took place.
Podczas wizyty w opactwie słuchaliśmy chóralnych pieśni.
During the visit to the abbey, we listened to choral songs.
In this case, 'opactwie' is used within a passive construction emphasizing the abbey as the subject in question.