The Lost History of Christianity: The Thousand-Year Golden Age of the Church in the Middle East, Africa, and Asia—and How It Died

by Philip Jenkins

by the time they took Constantinople, the Ottoman Empire included most of the Balkans, and by 1500 they controlled the whole Black Sea region. By 1520 they ruled most of the Muslim world west of Persia, as far as Algiers, and thus became the main antagonist for Christians, in Europe or beyond.