The Smederevo Fortress (Cмeдepeвcκa твpђaвa / Smederevska tvrđava) is a medieval fortified city in Smederevo, Serbia, which was the temporary capital of Serbia in the Middle Ages. It was built between 1427 and 1430 on the order of Despot Đurađ Branković, the ruler of the Serbian Despotate. It was further fortified by the Ottoman Empire, which had taken the city in 1459.
The fortress withstood several sieges by Ottomans and Serbs, surviving relatively unscathed. During World War II it was heavily damaged, by explosions and bombing. As of 2009 it is in the midst of extensive restoration and conservation work, despite which the fortress remains "one of the rare preserved courts of medieval Serbian rulers."
Smederevo Fortress was declared a national Monument of Culture of Exceptional Importance in 1979. In 2010, the fortress was placed on the tentative list for possible nomination as a World Heritage Site (UNESCO).
Smederevo Fortress, 45 kilometers southeast of Belgrade, covers 11.3 hectares in the center of the modern-day city of Smederevo. It is strategically located on the right bank of the Danube river on the triangular plain formed by the confluence of the Danube and Jezava rivers, only 72 meters above sea level. This location allowed the Serbian capital to remain near the Christian Kingdom of Hungary, while also satisfying Sultan Murad II of the Ottoman Empire by eliminating the uncontrolled passage of the Hungarians into the Morava Valley.
The fortress' position connecting the Balkans and Central Europe has made it an important religious and commercial center for centuries, now aided by being on the Pan-European X Corridor. The Danube also connects it to many other historic sites, most notably Belgrade and its suburb of Vinča, Novi Sad, Golubac Fortress, Lepenski Vir and Viminacium.
Amidst the turbulence of the Ottoman conquest of the Balkans in the early 15th century, the region's Christian rulers lost several battles, such as the Battle of Kosovo and the siege of Veliko Tarnovo.