First of all I would like to thank Mersin for being kind and for understanding.
I spent 4 months in his awesome flat in beautiful Istanbul because of the Erasmus program.
Flat is in a great possition in the heart of Istanbul and near to Istiklal and Taxim which are the best places for the nightlife. Everything is in the walking distance (it takes about 20 minutes to Topkapi palace,Haya Sofia and Blue Mosque).
Mersin was really kind and helped me a lot with everything thought the airb&b mail.
Thank you again!