Maria Beatrice d’Este (Italian: Maria Beatrice Ricciarda; 7 April 1750 – 14 November 1829) was the last descendant of the House of Este, of the House of Cybo-Malaspina and, through her maternal grandmother , also of the House of Gonzaga of Novellara and Bagnolo. Ducal princess of Modena and Reggio, she became the sovereign duchess of Massa and Carrara from 1790 until 1796 and from 1815 until her death in 1829. Through her marriage, she was co-founder of the new House of Austria-Este.