In 1972, Le Pen founded the Front National (FN) party. He then ran in the 1974 presidential election, obtaining 0.74% of the vote. In 1976, his Parisian flat was dynamited (he lived at that time in his castle of Montretout in Saint-Cloud). The crime was never solved. Le Pen then failed to obtain the 500 signatures from "grand electors" ("grands électeurs", mayors, etc.) necessary to present himself in the 1981 presidential election, won by the candidate of the Socialist Party (PS), François Mitterrand.