 About two to four million residents of Istanbul are Kurdish, meaning there are more Kurds in Istanbul than in any other city in the world.The Levantines, Latin Christians who settled in Galata during the Ottoman period, played a seminal role in shaping the culture and architecture of then-Constantinople during the 19th and early 20th centuries; their population in Istanbul has dwindled, but they remain in the city in small numbers.There are other significant ethnic minorities as well, the Bosniaks are the main people of an entire district – Bayrampaşa.