François Derand

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François Derand (* between 1588 and 1591 in Vic-sur-Seille , Diocese of Metz , † 1644 in Agde ) was a French Jesuit , architect and mathematician .

St-Paul-St-Louis, exterior view

Derand became a novice among the Jesuits in Rouen and studied philosophy at the Collège Henri-IV de La Flèche from 1613 to 1615 . From 1618 to 1621 he taught mathematics there and was ordained a priest in 1621. Then he was in Rouen (where he was involved in the construction of the Jesuit church) and from 1629 in Paris, where he completed the Jesuit church of St-Paul-St-Louis . It had been started by Étienne Martellange . Although Derand was formally responsible for this, he had a construction practitioner at his side. He paid special attention to the ornaments.

In 1643, his major architectural work L'architecture des voûtes (Architecture of the Vaults) appeared in Paris . It covers stereotomy , the use of descriptive geometry in the construction of vaults. In the preface he quotes Girard Desargues . The book was still being reprinted in the 18th century (1743, 1755).

After his book was published, he went to Agde at the request of the local bishop François Fouquet. He is buried in the Jesuit college in Béziers .

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