Photo: Andrija12345678, CC BY-SA 4.0 via Wikimedia Commons
Extensive collection of Serbia's military history. Good signage in English.
The Military Museum is a museum located in Belgrade, Serbia. Founded in 1878, the museum has over 3,000 ancient and modern items. These include Roman swords and helmets, Greek helmets and daggers, Serbian heavy knight's armor, axes, shields, helmets, crossbows, armoured gloves, as well as Western medieval weapons. There are also more modern guns, firearms, and elements of soldier's uniforms and equipment. Dioramas, plaques, and displays illustrate the use and historical context of the museum's collection.
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Саборна Црква Светог Архангела Михаила
The Cathedral Church of St Michael the Archangel is Orthodox, built 1837-40 in neoclassical style with a richly-decorated interior. Buried in front of the church are two notable Serbian linguists, Vuk Karadžić and Dositej Obradović.
Popular, but with a lot of animals in a small space.
Extensive display of Serbian costumes, tools, culture and everyday life in past centuries.
Modern Serbian art.
Бајракли џамија
Built around 1575 when Islam was the majority religion, it's now the only mosque in Belgrade. Bajrakli means "with flag" - the muwaqqit calculated the exact time of Islamic observances and hoisted a flag to advise the other city mosques, whereupon each muezzin called from their minaret to those within earshot. It's been smashed up several times, most recently in 2004 during the Kosovo conflict, but restored.
Large museum of Yugoslav, Serbian and international art of the 20th century, in a striking modern building.