This is the 6827th most frequent Turkish word.
bitlis
Bitlis: A city and province in eastern Turkey.
Here 'Bitlis' is used as a proper noun, denoting the name of a city in Turkey.
Bitlis, tarihi ve doğal güzellikleriyle ünlü bir şehirdir.
Bitlis is a city famous for its historical and natural beauties.
In this sentence, 'Bitlis' again refers to the city, indicated with the locative suffix "-te" to show location.
Bitlis'teki kaleyi ziyaret etmek istiyorum.
I want to visit the castle in Bitlis.
Here 'Bitlis' functions as the subject of the sentence, suggesting it as an option for a vacation destination.