In May 1453, Ottoman Sultan Mehmed II breached the ancient Theodosian Walls of Constantinople after a 53-day siege, ending the Byzantine Empire and marking one of the most dramatic moments in world history. The city's legendary triple walls had defended it for a thousand years against repeated assault; their final fall to Ottoman cannon represented the triumph of gunpowder artillery over medieval masonry fortification. The loss of Constantinople sent shockwaves through Christendom and transformed the political and cultural map of Europe and the Near East.

The fall of Constantinople displaced Greek scholars westward, accelerating the Italian Renaissance and the recovery of classical texts that would transform European poetry. Lamentations in Greek, Latin, and the vernacular poured from presses across Europe. Edmund Spenser's Faerie Queene and Milton's Paradise Lost both reflect the theological and imperial anxieties that the fall had embedded in Western Christian culture, while the city's broken walls became a recurring image of civilisational collapse in Renaissance verse.