Oprah Winfrey donates $12 million to African American history museum

Oprah Winfrey is giving $12 million to a planned Washington, D.C., museum that will document African American history. Items from her talk show could be part of its exhibits.

The National Museum of African American History and Culture announced Tuesday that Winfrey's gift, combined with her previous donation of $1 million, is its largest to date.

"I am so proud of African-American history and its contributions to our nation as a whole," Winfrey said in a statement released by the museum. "By investing in this museum, I want to help ensure that we both honor and preserve our culture and history, so that the stories of who we are will live on for generations to come."

Construction of the museum, which carries a $500-million price tag, started early last year on 5 acres at Washington's National Mall with a completion date set for sometime in 2015. The U.S. government is providing half of the funding for the museum, which will be the 19th addition to the Smithsonian, with the remainder to be raised by the museum.