WASHINGTON — Centuries of struggles and strife, decades of planning and pain, and years of hoping for a place that African-American history can call home culminated as President Barack Obama officially opened the Smithsonian National Museum of African American History and Culture.

Obama and first lady Michelle Obama opened the new Smithsonian National Museum of African American History and Culture on the National Mall by ringing a bell from a historic African-American church.

A shining bronze beacon on the National Mall, only steps away from a monument dedicated to a slaveholder president, the new Smithsonian chronicles the complex relationship between the United States and a people it once enslaved, and tells the story of those who worked to make the necessary changes to bring the country to where it is today.

“It doesn’t gauze up some bygone era or avoid uncomfortable truths,” Obama said in his weekly radio and internet talk. “Rather, it embraces the patriotic recognition that America is a constant work in progress, that each successive generation can look upon our imperfections and decide that it is within our collective power to align this nation with the high ideals of our founding.”

Thousands gathered on the National Mall on Saturday morning to watch Obama, the nation’s first black president, cut the ribbon to open the museum. People fiew in from around the country to be some of the first people inside, if they were lucky enough to get the much-coveted opening day tickets.

Ground was broken for the new museum in 2012 on a five-acre tract near the Washington Monument after a decades-long push for an African-American museum on the National Mall. Congressman John Lewis of Georgia, a longtime civil rights icon, worked with then-Sen. Sam Brownback of Kansas to usher legislation through Congress, and President George W. Bush signed into law the bill that allowed the museum to move forward.

Construction was completed earlier this year on the 400,000-square-foot museum designed by British-Ghanaian architect David Adjaye. The museum strikes a unique shape on the Mall with its three-tiered bronze exterior panels inspired by an African wooden column. The patterned bronze colored tiles are inspired by 19th century ironwork created by slaves in the South, and allow sunlight into the museum through patterned openings.

Inside, museum officials say they have nearly 3,000 items occupying 85,000 square feet of exhibition space including exhibits like a Tuskegee Airmen training plane and the casket of Emmitt Till, a murdered African-American boy whose death helped rally the civil rights movement.

“It’s been 100 years in the making. So many people have dreamed about this fought for this and wanted this to happen,” said U.S. Circuit Judge Robert L. Wilkins, who wrote the book “Long Road to Hard Truth” about the struggle to get the museum open. “It’s going to be a testament to their work and a testament to so many of our ancestors that this museum will open on the Mall.”

Millions of donors, both known and unknown, helped fund the museum. But some of the biggest donors’ names adorn the walls inside, including the Oprah Winfrey Theater; the Michael Jordan Hall: Game Changers; and the newest named addition, Robert F. Smith Explore Your Family History Center. It is named after the CEO of investment firm Vista Equity Partners after a $20 million gift announced Monday.

First lady Michelle Obama hugs former President George W. Bush during the dedication ceremony for the Smithsonian Museum of African American History and Culture on the National Mall in Washington, Saturday, Sept. 24, 2016. (AP Photo/Pablo Martinez Monsivais)

Pablo Martinez Monsivais