Eight hundred fifty million dollars and more than ten years. That is what it took to move the Obama Presidential Center from a sketch on Chicago's South Side to a finished campus with the curtain finally pulled back. On Thursday, Barack Obama stood on a stage in the city that made his career and dedicated the place, surrounded by a guest list that read less like a ribbon-cutting than like a Hollywood after-party crossed with a state funeral. Oprah Winfrey was there. So were Steven Spielberg, Tom Hanks, Stephen Colbert and George Lucas. Stevie Wonder and Bruce Springsteen played. The doors open to the public Friday.

The ceremony itself was invitation only, and the optics were carefully arranged. Every living former president and first lady turned up, according to CNBC's account of the dedication, with one notable pair of exceptions: Donald and Melania Trump, absent from the photographs of the assembled dignitaries. Joe and Jill Biden were there. So were George W. and Laura Bush, and Bill Clinton alongside Hillary Clinton. They lined up for a group portrait before the proceedings began, a tableau of the recent American establishment that the current president, conspicuously, sat out.

A homecoming dressed as a dedication

Obama spent much of his remarks talking about Chicago rather than about himself, a distinction that matters here. This is the city where a young community organizer became a state senator, then a U.S. senator, then something larger. "I found my purpose here," he told the crowd, adding that the city had fortified his faith and given him a community. It is the kind of line that lands differently when delivered a few miles from the neighborhoods where the man actually did the early, unglamorous work of local politics.

The center sits in Jackson Park, on the South Side, and the choice of location has never been incidental. Obama and his team fought for years to root the institution in a Black, working-class part of the city rather than on a university campus or a downtown plaza. That fight included lawsuits over parkland and a long argument with preservationists about what should be built where. The campus that opened Thursday is the resolution of all of it. Whether the surrounding neighborhood benefits the way the foundation has promised, with jobs and visitors and investment, is not a question a dedication can answer. It will be answered over the next decade.

The entertainment was not subtle about its star wattage. Jennifer Hudson sang. So did Christina Aguilera, Marc Anthony, Eddie Vedder and the Nigerian artist Tems, with The Roots in the mix as well. Vedder performed alongside Guitars Over Guns, a youth music nonprofit, and the Obama family was photographed on their feet, cheering. There is a version of this event that would have read as pure celebrity spectacle. The presence of a program like Guitars Over Guns, working with children in exactly the kind of communities the center claims to serve, was presumably meant to push against that reading. It only half worked. A dedication with Spielberg in the seats is going to photograph as a gala no matter who else is invited.

The politics nobody said out loud

The most consequential thing Obama said had nothing to do with architecture. He used the platform to defend democratic norms, describing the center as a vessel for the shared values that, he argued, make self-government possible. Among those values, he singled out the peaceful transfer of power once voters have spoken in free and fair elections.

Read that sentence again with the guest list in mind. Every living former president attended except the sitting one. The man who declined to attend, or was not invited, or both, is the same man whose refusal to concede the 2020 election produced the most serious test of the peaceful-transfer principle in modern American history. Obama did not name Trump. He did not have to. The framing did the work, and a room full of former presidents nodding along did the rest. As CNBC reported, the emphasis on democratic values ran through the whole event, threaded into what could have been a straightforward legacy celebration.

This is, in fairness, what presidential centers tend to become: arguments. They are built by the people whose records they curate, and they exist partly to shape how those records are remembered. The George W. Bush center in Dallas has its own framing of the Iraq war. The Clinton library in Little Rock has its version of the 1990s. None of them are neutral, and to expect the Obama center to be would have been naive. What is different here is the directness. The dedication doubled as a statement about the present, not only a monument to the past, and the absent guest was the whole point of the subtext.

Foreign dignitaries showed up too. Former German Chancellor Angela Merkel arrived, a reminder that Obama's network of allies extends well beyond American borders and well beyond his own party's current bench. Kamala Harris and her husband, Doug Emhoff, were there, as was Nancy Pelosi with her husband, Paul. David Letterman, who has interviewed Obama more than once since both men left their respective stages, was caught reacting to something during the ceremony, his expression unreadable in the photo.

What the building has to prove now

The spectacle ends Friday morning, when ordinary people start walking through the doors. That is when the harder accounting begins. An $850 million institution carries expectations that a dedication ceremony, however glittering, cannot satisfy on its own. The foundation has pitched the center as an engine for the South Side: a museum, a training ground, a draw for tourism dollars. Critics, among them longtime residents, have worried for years about displacement, and about whether the promised benefits will reach the people already living nearby or simply price them out.

Those are real questions, and the answers will accrue slowly. A presidential center is a strange kind of building. It is a museum, an archive, a programming hub and a piece of political legacy all at once, and it has to justify its cost on terms that a single Thursday cannot touch. Obama got his homecoming, his stars and his defense of democracy delivered to a friendly crowd. The harder verdict, the one rendered by the neighborhood and by the years, has not started yet.

Watch the foot traffic. Watch the hiring. Watch whether the surrounding blocks look different in five years, and for whom. That, rather than any guest list, is what will tell you what the Obama Presidential Center actually amounts to.