Istanbul in the 1970s, as people from Anatolia migrated to the city to find employment in the many new factories that were built on the outskirts of the sprawling metropolis. This sudden, sharp rise in the city's population caused a large demand for housing, and many previously outlying villages and forests became engulfed into the metropolitan area of Istanbul. Istanbul is located in north-western Turkey within the Marmara Region on a total area of . The Bosphorus, which connects the Sea of Marmara to the Black Sea, divides the city into a European, Thracian side—comprising the historic and economic centers—and an
History of Istanbul to Ankara. Since 1930, the native name "Istanbul" has been the sole official name of the city in Turkish and has since replaced the traditional name "Constantinople" in most western languages as well. Humans have lived in the area now known as Istanbul since at least the Neolithic period. The earliest known settlement dates from 6700 BC, discovered in 2008, during the construction works of the Yenikapı subway station and the Marmaray tunnel at the historic peninsula on the European side. The first human settlement on the Anatolian side, the Fikirtepe mound, is from the Copper Age period, with artifacts