Mandeville got its own historical marker in 1963, spotlighting the individual after whom it was named.
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Pierre Philippe de Marigny in 1830
According to Geni.com, Pierre Enguerrand Philippe de Marigny de Mandeville
was born in New Orleans in 1740, the son of Antoine de Marigny de Mandeville and Francois de l'Isle. He married Jeanne Marie d'Estrehan. He was made Colonel of Militia and put in command of the new Spanish town of Galvezton, near Baton Rouge.
"He built a colossal Marigny fortune reputed to be seven million dollars at his death. To concessions obtained from France by his father Antoine, he added large concessions granted to him by Spain, and profiting by opportunities, Pierre invested in real estate, buying large plantations which made him not only the greatest landowner of New Orleans, but also its richest citizen. Pierre de Marigny de Mandeville also purchased land on the opposite shore of Lake Pontchartrain from New Orleans in what is now Mandeville. He died in 1800 and was buried in St. Louis Cathedral, New Orleans, Louisiana."
