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Up until recently, there were only 12 works by celebrated Mexican artist Frida Kahlo in American public collections. Now, there’s one more on display at the Museum of Fine Arts, Boston. Dos Mujeres (Salvadora y Herminia) is the first painting Kahlo ever sold, and it’s been in the same family ever since.

Kahlo is known for her fantastical self-portraits, but Dos Mujeres shows two other women.

“They were her maids [who] worked in her house during her childhood, we believe,” says Rhona MacBeth, conservator of paintings at the MFA. “We’re still finding out more about them.”

Boston Museum Acquires First Painting Frida Kahlo Ever Sold

Images: (left) Imogen Cunningham/The Imogen Cunningham Trust/Courtesy of the Museum of Fine Arts, Boston and (right) Museum of Fine Arts, Boston