Mary Louise Curtis (August 6, 1876 in Boston, Massachusetts – January 4, 1970 in Philadelphia, Pennsylvania), was the founder of the Curtis Institute of Music in Philadelphia. She was the only child of the magazine and newspaper magnate Cyrus Curtis and Louisa Knapp Curtis, the founder and editor of the Ladies Home Journal.
Aged 13, writing under her mother's maiden name (as Mary L. Knapp), she was one of sixteen people on the staff of Ladies' Home Journal in 1890, the first year of Edward W. Bok's long tenure as editor of the magazine. In 1896, at the age of nineteen, she married Bok, who was fourteen years her senior. The couple had two sons, William Curtis Bok and Cary Curtis Bok. Her husband retired from the magazine in 1919, and they spent their winters in Florida, where they built the Bok Tower Gardens near Lake Wales. The marriage of Mary Louise and Edward Bok lasted 34 years until his death in 1930.
Mary Louise became involved with the Settlement Music School at the age of 48. At the time, the school was focused on providing musical training to young immigrants. In 1917, she made a gift to the school of $150,000 for a Settlement Music House. The music house's goal was "Americanization among the foreign population of Philadelphia." A close friend of the Bok family, pianist Josef Hofmann, played a recital at the school's dedication. Today this facility on Queen Street in Philadelphia is known as the Mary Louise Curtis Branch.
In 1924, she established the Curtis Institute of Music, which she named in honor of her father, who also had a great interest in music. After consulting with musician friends, including Josef Hofmann and Leopold Stokowski, on how best to help musically gifted young people, Mrs. Bok purchased three mansions on Philadelphia's Rittenhouse Square and had them joined and renovated. She established a faculty of prominent performing artists and made several gifts to the institute, eventually leaving it with an endowment of $12 million.