Tatiana Benita Moiseiwitsch, CBE, OC was an English theatre designer.
Born in London, the daughter of Daisy Kennedy, an Australian concert violinist and Benno Moiseiwitsch, a Russian/Ukrainian classical pianist, she attended the Central School of Arts and Crafts. A pioneering figure in 20th-century theatre design, Moiseiwitsch was the founding designer of the Canadian Stratford Festival and its theatre, and designed the interior of St. Catherine's Chapel, Massey College. She also designed the Stage of the Tyrone Guthrie Theatre in Minneapolis, Crucible Theatre, in Sheffield, England, which opened in 1971. Between 1935 and 1939 she was designer at the Abbey Theatre, Dublin, and designed more than 50 productions for it.
During her career, she had as many as five productions running at the same time in London, England. Some of her more notable productions included the Old Vic Company's Rostand's Cyrano de Bergerac, Britten's opera Peter Grimes at Covent Garden, Chekov's Uncle Vanya, and Sheridan's The Critic. She also designed sets and costumes for the English Stratford's 1953 tour of Australia. She designed a number of memorable sets for productions of the National Theatre.