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Fleurier, Switzerland, is the birthplace of Charles Édouard Guillaume, a renowned Swiss physicist and metrologist. Born in 1861, Guillaume made significant contributions to the field of metrology, particularly in the development of new alloys and the establishment of international standards for physical measurements. His work earned him the Nobel Prize in Physics in 1920 for his discovery of anomalies in the expansion of nickel-steel alloys, known as Guillaume's alloys.