Nebojša Tower (Serbian: Кула Небојша, romanized: Kula Nebojša; Greek: Πύργος Νεμπόισα) is the only surviving mediaeval tower of the Belgrade Fortress. Built in the 15th century, it was the major defensive tower of the fortress for centuries. Later it served as a dungeon and in 2010 it was adapted into the museum. The tower is located near the confluence of the Sava into the Danube.