The Fall of Constantinople, also known as the Conquest of Constantinople, was the capture of the capital of the Byzantine Empire by the Ottoman Empire.The city fell on 29 May 1453 as part of the culmination of a 53-day siege which had begun on 6 April. The city's collapse marked the end of the Middle Ages.. The attacking Ottoman Army, which significantly outnumbered …

The historiography of Christianization of the Roman Empire is a review of scholarly theories explaining how Christianity grew from its small, relatively obscure origin in AD 30 – AD 40, with fewer than 1,000 people, to become the majority religion of the entire Roman Empire by AD 350.. Until the last decades of the twentieth century, the primary theory was provided by Edward …