brought dead bodies which floated all the way from the Ustaše Jasenovac Concentration Camp, almost upstream. The fishermen were taking the bodies out of the water, so as former Italian soldiers turned prisoners by the German occupational forces after capitulation of Italy in September 1943. Bodies were buried around the tower and in the mass grave at the nearby Gate of Charles VI in the fortress' Lower Town. The mass graves are unmarked. From 1941 to 1945, some 5,000 bodies were retrieved from the Sava (of which only one person was identified), with majority being buried at the Belgrade New Cemetery and Topčider Cemetery. The tower was reconstructed in 1963. Architecture The Nebojša Tower belongs to the oldest type of the early artillery cannon towers. When built, it represented an important achievement in the architecture of the time. It has a regular octagon base, with thick walls. It has a ground floor and three storeys, with the total height of All floors have embrasures, or the cannon openings, on all sides, so that invaders can be shelled whether they advance from the river or from the land. The tower used to have a leveled top with the battlements and protruded wooden corbels. When Austrians reconstructed the tower in the first half of the 18th century, the top with the battlements was replaced with the roof construction which remained to this day. Museum Idea of turning the tower into the cultural center was announced in the late 2007. It was jump started by the €1,4 million donation from the European Centre for Byzantine and Post-Byzantine Monuments from Thessaloniki and conducted in the cooperation of the Centre and the Belgrade city administration. During the excavations around the tower, the remains of the Austrian armory from 1725 were discovered and conserved. The revitalization project was drafted by 148 experts from 18 institutes and companies, including the Serbian Academy of Sciences and Arts. The construction works lasted for 17 months, from June 2009 to December 2010. Almost of walls (including the façades) were restored or conserved, while of ramparts were revitalized. The revitalization process included embedding various materials: 100,000 hand-made bricks, of concrete, 150 tons of steel and iron while of glass was used to adapt the cannon openings into windows. Former waterfront rampart is adapted into the annex of the tower and serves as the lobby of the museum. An extension of the