Marie de Bourbon, Princess of Achaea
Marie of Bourbon (c. 1315–1387) was the sovereign baroness of Vostitsa in 1359-1370. She was princess consort of Achaea and titular Latin empress consort by marriage to Robert of Taranto, Prince of Achaea and titular Latin Emperor of Constantinople. Upon the death of Robert in 1364, she became princess regnant of Achaea until her death.