Dame Mary Barbara Hamilton Cartland, DBE, CStJ (born 1901, died 2000) was an English author of romance novels, one of the best-selling authors as well as one of the most prolific and commercially successful worldwide of the 20th century. Her 723 novels were translated into 38 languages and she continues to be referenced in the Guinness World Records for the most novels published in a single year in 1976. As Barbara Cartland she is known for her numerous romantic novels but she also wrote under her married name of Barbara McCorquodale and briefly under the pseudonym of Marcus Belfry. She wrote more than 700 books, as well as plays, music, verse, drama, magazine articles and operetta, and was a prominent philanthropist. She reportedly sold more than 750 million copies. Some of her noteworthy works include A Hazard of Hearts (1949), The Wicked Marquis (1973) and The Duke and the Preacher's Daughter (1978).