The last years of Mazarin's life, between 1657 and his death in 1661, were marked by a series of major diplomatic victories, In 1657 he made a military alliance with England. In 1658 he unveiled the League of the Rhine, a new group of fifty small German principalities which were now linked by a treaty with France. In the same year, Marshal Turenne decisively defeated the army of Condé at the Battle of the Dunes in Flanders. Between February and June 1659, Mazarin conducted intensive negotiations with the Spanish. On 7 November 1659 Spain signed the Treaty of the Pyrenees, which added Artois, the Cerdagne and Roussillon as new provinces of France. This was followed in June 1660 by an even more important diplomatic event carefully arranged by Mazarin; the marriage of Louis XIV with Maria Theresa of Spain. The marriage took place in Saint-Jean-de-Luz. The couple made a triumphant entry into Paris on 26 August 1660. This marriage and accompanying agreements ended, at least for a time, the long and costly wars between the Habsburgs and France.