This is the 762nd most frequent Turkish word.
şehrin
"Şehrin" means "of the city" or "the city's" in English.
The word 'şehrin' is a possessive form of 'şehir' (city), used to indicate that the parks belong to the city.
Şehrin parklarında yürüyüş yapmayı seviyorum.
I enjoy walking in the parks of the city.
Here, 'şehrin' is used as a possessive form to denote that the building is one of those belonging to the city.
Bu restoran, şehrin en eski binalarından birindedir.
This restaurant is in one of the oldest buildings of the city.
In this sentence, 'şehrin' shows possession; it specifies that the streets being calmer in the evenings belong to the city.