Pauline Clémentine Marie Walburga, Princess of Metternich-Winneburg zu Beilstein (née Countess Pauline Sándor de Szlavnicza; 25 February 1836 – 28 September 1921) was an Austrian socialite, mainly active in Vienna and Paris. Known for her great charm and elegance as well as for her social commitment, she was an important promoter of the work of the German composer Richard Wagner and the Czech composer Bedřich Smetana. She was also instrumental to the creation of the haute couture industry.