Information Kalemegdan: Kralja Petra 71/III (administrative building), 11000 Belgrade, Serbia, tel. +381 11 2620685, www.beogradskatvrdjava.co.rs
Opening hours (The Gallery, The Clock Tower): daily 10.00 – 17.00
Information on the Military Museum: Belgrade Fortress bb, 11000 Belgrade, Serbia, tel. +381 11 3343441, www.muzej.mod.gov.rs
Opening hours: Tue – Sun 10.00 – 16.00, Mon closed
Planetarium of Belgrade (information: tel. +381 11 3032133).
Nebojša Tower (Information: tel. +381 11 2620685; opening hours: Jun – Sep 10.00 – 20.00, Oct – May daily 10.00 – 18.00).
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