I never knew that retail art galleries barely existed in this country until the mid 1920s. Or that the reason they have flourished since then is because of an Eastern European immigrant named Edith Halpert, who started her career at the original (and still standing) Macy’s in New York City.

I just learned this at a talk by Lindsay Pollock, the author of a new book on Halpert, “The Girl with the Gallery: Edith Gregor Halpert and the Making of the Modern Art Market” (PublicAffairs, a member of the Perseus Books Group, 2007, $16.95).

Halpert’s talent as an artist developed early. She went to work as an illustrator in Macy’s advertising department while in her teens. It was there, Pollock says, that Halpert picked up the principles of retail merchandising, store layout and design, and customer service.

After marrying an artist, the pair lived for a time in Europe, where retail art galleries were already established but had more of a museum atmosphere. She realized there was a market for galleries in New York after meeting and cultivating the artists she met in Europe. She took a gamble and opened her Downtown Gallery in New York, a tasteful but homey place where visitors were made to feel comfortable around the art and artists.

The gallery flourished for 44 years. Halpert invented the market for American folk art, and championed the growth of the American modern art movement. She cut legendary deals with artists and educated her patrons.

She became an icon in the art world. And she did it by doing what I constantly harp on in this blog: If you want to be a successful retailer, study what the really successful retailers are doing. Then adapt their practices to your store’s style. Halpert had the good sense to absorb it all as a teen at Macy’s. All you have to do is take a walk through your regional mall. I’ll bet it even has a Macy’s.