Before there was “Mad Men” and Don Draper, there was Florence Knoll, as she was known , arguably the designer most responsible for the square-jawed corporate look that conquered American offices after World War II.

Florence Knoll Bassett, who died this year at 101, lived to see her spare, handsome office landscapes televised more than a half century after Knoll Associates — where she was the eye and force majeure — invented the structured style that we now call “midcentury modern.” Trained as an architect, she translated Bauhaus architecture into low, clean-lined, floaty furniture, and helped establish interior design as a profession.

“I am not a decorator,” she pointedly clarified in 1964 in a New York Times interview. “The only place I decorate is my own house.”

Phillips is now offering a peek into just how, in fact, Florence Knoll Bassett decorated her homes in New York, and then Florida, where, after the death of her husband Hans Knoll, she married Harry Hood Bassett, a Miami banker. Some 50 artworks are being offered at two evening sales, on Oct. 25 and Nov. 14.