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Books about Crucy:
Brantome / par Francois Crucy by Francois Crucy (1934)
Report of Ezra H. Crucy Heywood's Defense Before The United States Court in Boston, April 10, 11 and 12, 1883;... by Anonymous (Feb 8, 2012)
Mathurin Crucy, 1749-1826: Architecte Nantais Neo-Classique (1986)
Wiki information Crucy:
Mathurin Crucy was a French architect and urban planner, who conceived a major Neo-Classical architectural programme for Nantes which deeply marked the town.
Louis Crucy was a French architect and brother of Mathurin Crucy, with whom he worked on the naval facilities at Indre, near Nantes, from 1800 onwards, as they expanded due to the war effort against England.