Living with De La Salle from the age of six, when their parents died, until the age of sixteen, Pierre's education was supervised by his oldest brother. After spending a short time with his oldest sister when De La Salle and the Brothers moved out of the family home, Pierre studied law and became a successful lawyer in Paris, eventually becoming magistrate of the Presidial Court of Reims, as his father had been. Married in 1696 at the age of twenty-nine to Francoise-Henriette Bachelier, a distant cousin, the couple had eight children. After the deaths of both De La Salle and Jean-Louis, Pierre reorganized the civil association that continued to support the Brothers' work in Reims.
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