About Maria Teresa Cybo-Malaspina, Duchess of Massa
Maria Teresa Cybo-Malaspina (29 June 1725 – 29 December 1790) was the sovereign Duchess of Massa and Princess of Carrara from 1731 until her death in 1790.
She was the eldest child of Alderano I Duke of Massa and Carrara, and his wife Ricciarda Gonzaga, daughter of Camillo, Count of Novellara.
She was the wife of Ercole III d'Este, Duke of Modena.