when was the name constantinople changed to istanbul
Names of Istanbul Names other than استانبول (İstanbul) had become obsolete in the Turkish language during the late Ottoman/early republican periods. However, Constantinople was still used when writing the city's name in Latin script. In 1928, the Turkish alphabet was changed from Arabic script to Latin script. After that, Turkey started to urge other countries to use Turkish names for Turkish cities, instead of other transliterations to Latin script that had been used in the Ottoman times.[19] Letters or packages sent to "Constantinople" instead of "Istanbul" were no longer delivered by Turkey's PTT, which contributed to the eventual worldwide adoption of the new name.[citation needed]
Ottoman Empire The Ottoman Empire (/ˈɒtəmən/; Devlet-i ʿAlīye-i ʿOsmānīye[dn 5]), also historically known in Western Europe as the Turkish Empire[8] or simply Turkey,[9] was a state that controlled much of southeastern Europe, western Asia and northern Africa between the 14th and early 20th centuries. It was founded at the end of the 13th century in northwestern Anatolia in the town of Söğüt (modern-day Bilecik Province) by the Oghuz Turkish tribal leader Osman.[10] After 1354, the Ottomans crossed into Europe, and with the conquest of the Balkans, the Ottoman Beylik was transformed into a transcontinental empire. The Ottomans ended the Byzantine Empire with the 1453 conquest of Constantinople by Mehmed the Conqueror.[11]