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.