The PTT (Post - Telephone - Telegram company) museum in Istanbul is located inside the historic building of main post office at Sirkeci neighborhood. It houses several old phone units, telegram machines, first stamp from 1863 and other late Ottoman or early Republic period stamps, old seals and mail boxes, postal clerk uniforms, and some photos of the first communication systems in Turkey.

Open daily except weekends and holidays, between 08:30-12:30 and 13:30-17:30