This is the 3532nd most frequent Polish word.
albert
"Albert" in Polish is not a standalone word with a specific definition; it is typically a proper noun, used as a male name.
In this case, "Albert" indicates the creator of the painting, showing personal attribution in the genitive case.
W muzeum widziałem obraz namalowany przez Alberta.
In the museum, I saw a painting painted by Albert.
In this sentence, "Albert" is used as a proper noun to refer to a person's name.
Albert mieszka w Warszawie.
Albert lives in Warsaw.
Here, "Albert" is the accusative form of the proper noun "Albert," used after the verb "to see."