July 20

On the 20th in 1921, Alice Mary Robertson became the first woman to preside over the House of Representatives in the United States Congress. She was the second woman[i] in the House, but the first female representative from Oklahoma. There would not be another female representative from Oklahoma until 2006[ii].

[i] Jeannette Rankin represented Montana from 1917 to 1919.
[ii] Mary Fallin was elected to represent Oklahoma's 5th congressional district.