The Federal Constitution of the Swiss Confederation (SR 10, German: Bundesverfassung der Schweizerischen Eidgenossenschaft (BV), French: Constitution fédérale de la Confédération suisse (Cst.), Italian: Costituzione federale della Confederazione Svizzera (Cost.), Romansh: ) of 18 April 1999 (SR 101) is the third and current federal constitution of Switzerland.