Stunning pictures from inside the new National Museum of African American History and Culture

The Smithsonian's National Museum of African American History and Culture opens on Sept. 24 in Washington after a long journey. Thirteen years since Congress and President George W. Bush authorized its construction, the 400,000-square-foot building stands on a five-acre site on the National Mall, close to the Washington Monument. President Obama will speak at its opening dedication.

Appropriately for a public museum at the heart of Washington’s cultural landscape, the museum’s creators did not want to build a space for a black audience alone, but for all Americans. In the spirit of Langston Hughes’s poem “I, Too,” their message is a powerful declaration: The African-American story is an American story, as central to the country’s narrative as any other, and understanding black history and culture is essential to understanding American history and culture.