This is the 208th most frequent Polish word.
galerii
"Galerii" is the genitive or locative singular form of "galeria," meaning "gallery."
In this sentence, 'galerii' is used in the locative case, referring to a specific place.
Byłem w galerii sztuki wczoraj.
I was at the art gallery yesterday.
Here, 'galerii' is in the genitive case, used to denote origin or association.
Zdjęcia z tej galerii są bardzo piękne.
The photos from this gallery are very beautiful.
In this context, 'galerii' is in the accusative case, indicating a direction or destination.