"Central Istanbul's Tünel celebrates 136th anniversary
To mark the 136th anniversary of the establishment of the Tünel in central Istanbul, the Istanbul Public Transport Authority, or İETT, has translated French engineer Eugene Henri Gavand’s book “Tunnel de Constantinople” (Istanbul Tunnel), which he released in 1876 in Paris, into Turkish for a new edition."
More:Central Istanbul's Tünel celebrates 136th anniversary - Hurriyet Daily News and Economic Review