In an especially revealing snap, Lew was seen overlooking a portrait of Harriet Tubman, the African-American civil rights icon who was chosen as the new face of the $20 note. It is unclear whether this is the portrait of Tubman that will ultimately appear on the $20 bill.
Lew penned an open letter on Wednesday announcing why Tubman was chosen.
“The decision to put Harriet Tubman on the new $20 was driven by thousands of responses we received from Americans young and old. I have been particularly struck by the many comments and reactions from children for whom Harriet Tubman is not just a historical figure, but a role model for leadership and participation in our democracy," Lew wrote. "You shared your thoughts about her life and her works and how they changed our nation and represented our most cherished values.”