Answer by taking a quote from the following article:

Marian Anderson (February 27, 1897 - April 8, 1993) was an African-American contralto and one of the most celebrated singers of the twentieth century. Music critic Alan Blyth said: "Her voice was a rich, vibrant contralto of intrinsic beauty." Most of her singing career was spent performing in concert and recital in major music venues and with famous orchestras throughout the United States and Europe between 1925 and 1965. Although offered roles with many important European opera companies, Anderson declined, as she had no training in acting.

Although Anderson retired from singing in 1965, she continued to appear publicly. On several occasions she narrated Aaron Copland's Lincoln Portrait, including a performance with the Philadelphia Orchestra at Saratoga in 1976, conducted by the composer. Her achievements were recognized and honored with many prizes, including the NAACP's Spingarn Medal in 1939; University of Pennsylvania Glee Club Award of Merit in 1973; the United Nations Peace Prize, New York City's Handel Medallion, and the Congressional Gold Medal, all in 1977; Kennedy Center Honors in 1978; the George Peabody Medal in 1981; the National Medal of Arts in 1986; and a Grammy Award for Lifetime Achievement in 1991. In 1980, the United States Treasury Department coined a half-ounce gold commemorative medal with her likeness, and in 1984 she was the first recipient of the Eleanor Roosevelt Human Rights Award of the City of New York. She has been awarded honorary doctoral degrees from Howard University, Temple University and Smith College.  In 1986, Anderson's husband, Orpheus Fisher, died after 43 years of marriage. Anderson remained in residence at Marianna Farm until 1992, one year before her death. Although the property was sold to developers, various preservationists as well as the City of Danbury fought to protect Anderson's studio. Their efforts proved successful and the Danbury Museum and Historical Society received a grant from the State of Connecticut, relocated the structure, restored it, and opened it to the public in 2004. In addition to seeing the studio, visitors can see photographs and memorabilia from milestones in Anderson's career.  Anderson died of congestive heart failure on April 8, 1993, at age 96. She had suffered a stroke a month earlier. She died in Portland, Oregon, at the home of her nephew, conductor James DePreist, where she had relocated the year prior. She is interred at Eden Cemetery, in Collingdale, Pennsylvania, a suburb of Philadelphia.

What did she do before dying?
Anderson remained in residence at Marianna Farm until 1992,