Anna Mary Robertson was born in Greenwich, New York on September 7, 1860; she was the third of ten children born to Margaret Shanahan Robertson and Russell King Robertson. She was raised with four sisters and five brothers. Her father ran a flax mill and was a farmer. As a child, Moses attended a one-room school for a short period of time. That school is now the Bennington Museum in Vermont, which has the largest collection of her works in the United States. She was inspired to paint by taking art lessons at school. Moses first painted as a child, using lemon and grape juice to make colors for her “landscapes”. Other natural materials that she used to create works of art included ground ochre, grass, flour paste, slack lime and sawdust.

Five of the ten children born to them survived infancy. Although she loved living in the Shenandoah Valley, in 1905 Anna and Robert moved to a farm in Eagle Bridge, New York at her husband’s urging. When Thomas Moses was about 67 years of age in 1927, he died of a heart attack, after which Anna’s son Forrest helped her operate the farm. Anna Moses never married again. She retired and moved to a daughter’s home in 1936. Anna Mary was known as either “Mother Moses” or “Grandma Moses,” and although she first exhibited as “Mrs. Moses,” the press dubbed her “Grandma Moses,” and the nickname stuck.

As a young wife and mother, Moses was creative in her home; for example, in 1918 she used housepaint to decorate a fireboard. Beginning in 1932, Moses made embroidered pictures of yarn for friends and family. She also created beautiful quilted objects, a form of “hobby art” as defined by Lucy R. Lippard.

During a visit to Hoosick Falls in 1938, Louis J. Caldor, an art collector who worked as an engineer in the state of New York, saw paintings made by Moses in the window of a drug store. He bought their supply and ten more from her Eagle Bridge house for $3 or $5 each. The next year, three Grandma Moses paintings were included in New York’s Museum of Modern Art exhibition entitled “Contemporary Unknown American Painters”. Her first solo exhibition, “What a Farm Wife Painted,” opened in the same city in October 1940 at Otto Kallir’s Galerie St. Etienne. A meet-and-greet with the artist and an exhibition of 50 paintings at Gimbel’s Department Store was held next on November 15. Her art displays included samples of her baked goods and preserves that won Moses prizes at the county fair. Her third solo show in as many months, was held at the Whyte Gallery, Washington, D.C. In 1944, she was represented by the American British Art Center and the Galerie St. Etienne, which increased her sales. Her paintings were exhibited throughout Europe and the United States over the next 20 years. Otto Kallir established the Grandma Moses Properties, Inc. for her.

President Harry S. Truman presented her with the Women’s National Press Club trophy Award for outstanding accomplishment in art in 1949. Jerome Hill directed the 1950 documentary of her life, which was nominated for an Academy Award. In 1952, she published My Life’s History, her autobiography. In it she said “I look back on my life like a good day’s work, it was done and I feel satisfied with it. I was happy and contented, I knew nothing better and made the best out of what life offered. And life is what we make it, always has been, always will be.” In 1955, she appeared as a guest on See It Now, a television program hosted by Edward R. Murrow.

In 1950, the National Press Club cited her as one of the five most newsworthy women and the National Association of House Dress Manufacturers honored her as their 1951 Woman of the Year. When she reached 88, Mademoiselle magazine named her a “Young Woman of the Year.” She was awarded two honorary doctoral degrees. The first was bestowed in 1949 from Russell Sage College and the second two years later from the Moore College of Art and Design.

She was a member of the Society of Mayflower Descendants and Daughters of the American Revolution. Her 100th birthday was proclaimed “Grandma Moses Day” by New York Governor Nelson Rockefeller. LIFE magazine celebrated her birthday by featuring her on its September 19, 1960, cover. The children’s book Grandma Moses Story Book was published in 1961.

Grandma Moses died at age 101 on December 13, 1961 at the Health Center in Hoosick Falls, New York. She is buried there at the Maple Grove Cemetery. President John F. Kennedy memorialized her: “The death of Grandma Moses removed a beloved figure from American life. The directness and vividness of her paintings restored a primitive freshness to our perception of the American scene. Both her work and her life helped our nation renew its pioneer heritage and recall its roots in the countryside and on the frontier. All Americans mourn her loss.” After her death, her work was exhibited in several large traveling exhibitions in the United States and abroad.