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In page Bellfounding:

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François Hemony (c. 1609–1667) and his brother Pieter, Pierre, or Peter Hemony (1619–1680) were the greatest carillon bell founders in the history of the Low Countries. They developed the carillon, in collaboration with Jacob van Eyck, into a full-fledged musical instrument by casting the first tuned carillon in 1644. The Hemony Brothers are regarded as the first of the modern western bell-founders who used a scientific approach to casting the optimum shape and tuning bells to enable them to be harmonically tuned.