On May 29, 1453, Ottoman Sultan Mehmet II captured Constantinople, bringing an end to over a thousand years of Byzantine rule. The city's formidable walls, which had stood nearly impenetrable for eight centuries, finally fell to hisforces. With its conquest, Constantinople was declared the new capital of the Ottoman Empire. Some historians marked this conquest as the end of the Middle Ages. Built by Theodosius II to safeguard the "New Rome," these walls stretched from the Golden Horn to the Sea of Marmara, marking the borders of ancient Istanbul. Through centuries of earthquakes, sieges, and urban expansion, their gates and fortifications have endured, preserving the legacy of the city's past. To discuss the world-history importance of this conquest is today’s guest, Alexander Christie-Miller, author of “To The City: Life and Death Along the Ancient Walls of Istanbul.” See omnystudio.com/listener for privacy information.