Princess Maria Rosetti (born Marie Grant; 1819 – February 25 [O.S. February 13] 1893) was a Guernsey born Wallachian and Romanian political activist, journalist, essayist, philanthropist and socialite. The sister of British diplomat Effingham Grant and wife of radical leader C. A. Rosetti, she played an active part in the Wallachian Revolution of 1848. She was also noted for her enduring friendships with the painter Constantin Daniel Rosenthal and with Pia Brătianu, the wife of National Liberal politician Ion Brătianu. The Rosettis were parents to eight sons: Mircea, Ion, Vintilă (journalist and writer), Horia, Elena-Maria, Toni, Floricel and Libertatea Sophia, all of whom were noted for their political activities.