This is the 7792nd most frequent Polish word.
matejko
"Matejko" is a Polish surname, most notably associated with Jan Matejko, a renowned 19th-century painter.
Here, 'Matejki' refers to Jan Matejko, a renowned Polish painter, and is used possessively to denote his artwork.
W muzeum jest obraz Matejki.
In the museum, there is a painting by Matejko.
In this sentence, 'Matejki' again refers to Jan Matejko, specifically indicating his historical paintings and their educational significance.
Często widuję dzieła Matejki w podręcznikach do historii.
I often see Matejko's works in history textbooks.
The word 'Matejko' is used here to refer to the artist himself.