This is the 2547th most frequent Polish word.
piotrkowskiej
"Piotrkowskiej" is the genitive or locative form of "Piotrkowska," referring to something related to Piotrkowska Street, a well-known street in Łódź, Poland.
In this sentence, 'Piotrkowskiej' is used in the locative case, indicating location within Piotrkowska Street.
Spacerujemy po Piotrkowskiej ulicy.
We are walking along Piotrkowska Street.
Here, 'Piotrkowskiej' is in the locative case due to its association with the preposition 'na', indicating the location of the building.
Historia tej kamienicy na Piotrkowskiej jest fascynująca.
The history of this building on Piotrkowska Street is fascinating.
In this context, 'Piotrkowskiej' again takes the locative case, showing where the meeting occurred.