This is the 8918th most frequent Polish word.
siewierz
"Siewierz" is a town in southern Poland.
Here, 'Siewierz' is used as a proper noun, specifically the name of a geographical location.
Siewierz to malownicze miasto w Polsce.
Siewierz is a picturesque town in Poland.
'Siewierz' is again used as a proper noun referring to the town, emphasizing travel and destinations.
Lubię podróżować do Siewierza w okresie letnim.
I like travelling to Siewierz during the summer period.
Here, 'Siewierz' indicates the location where the castle is being inquired about.