The Epinay Congress was the third national congress of the French Socialist Party (Parti socialiste or PS), which took place on 11, 12 and 13 June 1971, in the town of Épinay-sur-Seine, in the northern suburbs of Paris. During this congress, not only did the party admit the Convention of Republican Institutions (Convention des institutions républicaines or CIR, a federation of left-wing republican groups led by François Mitterrand) into its ranks, but the party leadership was also won by Mitterrand and his supporters. For the observers and the French Socialists themselves, the Epinay Congress was the real founding act of the current PS. It was also the turning point in Mitterrand's grand political plan, which led to the ascendancy of the French Left over the next quarter-century, and eventually, in 1981, to Mitterrand's election to the Presidency of France for two consecutive 7-year terms.