When Belgrade passed to Hungary in 1427, despot Đurađ Branković needed a new capital. He chose an uninhabited bank at the Jezava–Danube confluence — neutral ground, near enough to Hungary to keep that alliance, and positioned to control the Danube traffic the Ottomans feared. Construction began in the autumn of 1428 under the eye of George Palaiologos Kantakouzenos, with stones hauled from the Roman ruins of Viminacium, Margum and Mons Aureus; by 1430 the Small Town — the despot’s castle, with its palace, throne hall and donjon — was finished, and a tower still carries the brick inscription naming the despot and the year 6938 (1430). The Great Town’s ramparts followed in the 1440s, enclosing ten hectares for the townspeople. Smederevo became the stage of Serbia’s last decades: the 1434 treaty with Venice was signed in its great hall, the despot’s mint struck its silver here, and in 1459, after a siege, the Ottomans took the town — the conventional end-date of medieval Serbia. Under the Ottomans the fortress kept garrison and arsenal; a catastrophic 1941 ammunition explosion inside the walls killed some 2,500 people and wrecked much of the town. Declared a Monument of Culture of Exceptional Importance in 1946 (renewed 1979), the fortress has been steadily restored and placed on Serbia’s UNESCO tentative list in 2010.