Belgium’s racist colonial past was on full display at an Africa-themed party over the weekend that featured blackface, pith helmets and voodoo-like skulls on sticks, according to a new report.

The sold-out event was hosted Sunday by the company Thé Dansant and held at the Royal Museum for Central Africa just outside Brussels.

On Facebook, organizers encouraged a dress code of “la sape, colorful, wakanda, future African” — but at least one of the 2,000 revelers showed up in blackface and a tribal dress, according to the Telegraph in the UK.

Photos posted on social media show others wearing leopard-skin print and some dressed as colonial-era explorers with pith helmets.

Emma Lee Amponsah, of the Belgian-Congolese activist group Café Congo, slammed Thé Dansant for the event, which also included a stage adorned with skulls on sticks.

“Ethnic, exotic or African is not a costume that you can put on and take off,” she told the Bruzz newspaper, according to the Telegraph. “In this way stereotypes are constantly being maintained. Explain to me how an event like this can still exist in 2019.”

The museum itself, which opened in 1897, is controversial. It underwent a decade-long “decolonization” makeover after displaying for years King Leopold II’s personal collection of artifacts from his notoriously brutal reign over the Congo Free State from 1885 to 1908.

In 1897, a human zoo of more than 260 Congolese people was held on museum grounds. Seven died of exposure after being put on display during the world’s fair.

An estimated 10 million Congolese were killed during Leopold’s rule — which included amputating children’s hands when their fathers failed to meet rubber collection quotas.

Before its overhaul, the museum, colloquially known as Africa Museum, held more than 180,000 stolen items, like skulls of beheaded tribal chiefs and more than 500 stuffed poached animals, the Telegraph reported.

Spokeswoman Primrose Ntumba said the museum had nothing to do with the Africa-theme party — and couldn’t stop the event from taking place because it sits on federal property.

“The museum continues to be a symbol in Belgium of colonialism,” she told the Brussels Times. “If you organize an event on the steps of a building that has been in the media a great deal over the past year, then I find it extremely regrettable that Thé Dansant failed to see that an African dress-up party is bound to provoke angry reactions, particularly in this location.”

The museum also issued a statement saying it tried to convince Thé Dansant to change its dress code.

“This measure turned out to be insufficient as some of the participants still chose to wear stereotypical outfits,” the museum said. “We take this incident seriously and want to apologize for mishandling the situation in such a way that this took place.”

But party organizer Kjell Materman said the get-together was aimed at celebrating African culture.

“Even if one person painted his face black, it was not meant to be offensive,” Materman said. “Many people of African origin were enthusiastic about the concept and were present.”

In February, United Nations experts called on Belgium to apologize for its colonization of Congo and make reparations for the atrocities committed. Congo became independent in 1960.

“(We are) concerned about the human rights situation of people of African descent in Belgium who experience racism and racial discrimination,” the experts said. “There is clear evidence that racial discrimination is endemic in institutions in Belgium.”