Mr Johnson, as foreign secretary and prime minister, has previously highlighted girls' education as a key to improving the health, wealth and security of the poorest countries. He once described it as the "Swiss army knife" of development, as getting girls to stay in education could avoid early marriage, improve their chances of getting a job and provide more income for children to be better fed.
The "Rising Tide" exhibition shows the level of resistance, including violence, against women wanting to study at Cambridge with equal rights to men. This includes the remnants of a firework thrown by protesters in 1897 as they rioted against the revolutionary idea of women getting degrees.