<P> The migration waves of Byzantine scholars and émigrés in the period following the sacking of Constantinople and the fall of Constantinople in 1453 is considered by many scholars key to the revival of Greek and Roman studies that led to the development of the Renaissance humanism and science . These émigrés were grammarians, humanists, poets, writers, printers, lecturers, musicians, astronomers, architects, academics, artists, scribes, philosophers, scientists, politicians and theologians . They brought to Western Europe the far greater preserved and accumulated knowledge of their own (Greek) civilization . </P> <P> Between 1919 and 1922, Greek politician Eleftherios Venizelos attempted to implement the Megali Idea (recapture of Constantinople from the Ottoman Empire) in the Greco - Turkish War (1919--1922) since the Ottoman Empire was severely weakened by its defeat in World War I and by the occupation of Constantinople by the British and French . However, in the course of the war Venizelos lost the election of 1920 and went into exile and Greece was defeated in the war by Turkey . </P> <P> Ottomans used the Arabic transliteration of the city's name "Kostantiniyye," (القسطنطينية), as can be seen in numerous Ottoman documents . Islambol (اسلامبول, Full of Islam) or Islambul (find Islam) or Islam (b) ol (old Turkic: be Islam), both in Turkish Language, were folk - etymological adaptations of Istanbul created after the Ottoman conquest of 1453 to express the city's new role as the capital of the Islamic Ottoman Empire . It is first attested shortly after the conquest, and its invention was ascribed by some contemporary writers to Sultan Mehmed II himself . </P> <P> The name of Istanbul is thought to be derived from the Greek phrase īs tīmbolī (n) (Greek: εἰς τὴν πόλιν, translit . eis tēn pólin, "to the City"), and it is claimed that it had already spread among the Turkish populace of the Ottoman Empire before the conquest . However, Istanbul only became the official name of the city in 1930 by the revised Turkish Postal Law as part of Atatürk's reforms . </P>

After capturing constantinople in 1453 what did the ottomans rename it