Shortly after the marriage of his oldest daughter Clara Maria with Theodor Kerckring (also written as 'Kerckrinck') in 1671, Van den Enden moved to Paris, where he opened another Latin school. There he was visited by Antoine Arnauld and Gottfried Wilhelm Leibniz. He also got involved in a plot against Louis XIV, but the conspirators were caught before they could execute their plans, the establishment of a republic in Normandy. Franciscus van den Enden was condemned to death and on 27 November 1674, after the decapitation of the noble conspirators, he was hanged before the Bastille.