Comedian Bill Maher during his latest show mocked the Obama Presidential Center, which opened in Chicago last week.

“It looks like something aliens built in Dubai,” Maher remarked on the Friday episode of HBO’s “Real Time” while talking with Rep. Ro Khanna (D-Calif.) and Politico journalist Jonathan Martin.

“It cost $850 million,” he added later. “I don’t understand why progressives like this. Couldn’t that, you know, money be better spent on something else. Who’s going to go to this?”

The Obama Presidential Center, based in former President Obama’s hometown of Chicago, had a grand opening ceremony last week. The campus features a prominent large gray building with a hexagon-like shape.

Khanna defended the center, saying that “at a time that Elon Musk is talking about sending people to Mars, you’re telling me that spending up to a billion dollars, $1 billion, on commemorating the first and only African-American who’s ever been president isn’t worth it?”

On Thursday, the former president took a veiled swipe at President Trump while celebrating the center’s opening. 

Obama referenced the U.S.’s founding by echoing the words of the Declaration of Independence, saying that it laid out there “will be no kings or lords, no serfs or subjects, but only citizens, each of us free to pursue our own version of happiness and able to determine our collective faith to an elected representative government.”

Trump has previously portrayed himself as a king in AI-generated social media posts.