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Benedetto Castelli
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<p>Benedetto Castelli <a href="/facts/Benedictines/wPDY4zrT">O.S.B.</a> (1578 – 9 April 1643), born Antonio Castelli, was an <a href="/facts/Italians/dsdUeJ1n">Italian</a> mathematician. Benedetto was his name in religion on entering the <a href="/facts/Benedictine_Order/wPDY4zrT">Benedictine Order</a> in 1595. </p>