A constitutional referendum was held in Switzerland on 31 October 1880 aiming at a complete overhaul of the constitution. The constitutional amendments were rejected by 68.2% of voters and a majority of cantons.
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Nội dung từ bài Wikipedia “Trưng cầu dân ý hiến pháp Thuỵ Sĩ năm 1880”, theo giấy phép CC BY-SA 4.0.