The Leadership Conference on Civil and Human Rights

In honor of Women's History Month, the Smithsonian National Postal Museum is featuring an online exhibit called "Women on Stamps: Part One." This collection is the first in a series of four stamp collections that focus on the accomplishments of women.

In 1893, Queen Isabella I of Spain was the first woman to appear on a U.S. postage stamp. Since that time, the U.S. has honored women by issuing over 200 stamps that feature pioneering women.

"Women on Stamps: Part One" highlights women who have made their mark on politics and social justice, including Sojourner Truth, Harriet Tubman, and Elizabeth Cady Stanton.