Gardoš is an urban neighborhood of Belgrade, the capital of Serbia. It is located in Belgrade's municipality of Zemun. Located on the slopes of the hill of the same name, with its tower and preserved old architecture, Gardoš is the major historical landmark of Zemun. Remnants of the Gardoš Fortress, built in the 14th century and the 15th century, are th…Gardoš is an urban neighborhood of Belgrade, the capital of Serbia. It is located in Belgrade's municipality of Zemun. Located on the slopes of the hill of the same name, with its tower and preserved old architecture, Gardoš is the major historical landmark of Zemun. Remnants of the Gardoš Fortress, built in the 14th century and the 15th century, are the oldest surviving parts of Zemun.