Born Domenica Tassinari, she studied with Vezzani and Marcantoni, and made her debut in 1929, as Mimi, in Casale Monferrato. She sang widely in Italy before making her debut at La Scala in Milan in 1932. She also appeared in Russia and South America, and made her debut at the Metropolitan Opera in New York City in 1947, as Tosca. She appeared in Naples in a notable revival of Saverio Mercadante's Il giuramento in 1955.
She was married to tenor Ferruccio Tagliavini with whom she often appeared on stage and on disc. They can be heard together in a number of complete opera recordings: Un ballo in maschera, Martha, Werther, L'arlesiana, and most notably L'amico Fritz, conducted by Pietro Mascagni himself.
Tassinari had a beautiful voice of great range, and she brought considerable warmth, sensitivity, and refinement to whatever she was singing.
- Le guide de l'opéra, les indispensables de la musique, R. Mancini & J-J. Rouvereux, (Fayard, 1986), ISBN 2-213-01563-5