Banksy's suspected artwork appeared in the center of London after the closing ceremony of extermination protests.
The Museum of the Environment, which has yet to be confirmed as Benki, materialized overnight on a wall in Marble Arch and has a similar stylized style used by an unidentified artist.
It shows a child holding a sign on Extermination of rebellion an emblem while kneeling near a factory shoots germination from the ground.
"From this moment on, despair ends and tactics begin," the accompanying words say.
Works of art gained traction from members of the public early on Friday, with many passersby photographing and gathering around it.
It is thought that the organizers of the extermination of the rebellion were created at the end of 10 days of protest in the capital of a nearby ceremony that took place at the president's office in Hyde Park.
Clinton Benson, 48, said the artwork "represents the will of the people here and the people of the nation".
When asked how confident he is Banksy's painting, he said: "100% it's Banksy, already confirmed by street artists and the whole community knows about it. Most of them were here."
Steve Jones, 53, added that the artwork "just appeared".
"I came back from the meeting to exterminate the insurgency and it was there," he said.
At the closing event, Skeena Rator, the group's coordinator, invited eco-protesters to "start a process of thinking" after the demonstration, disrupting hundreds of thousands of passengers.
"Thank you for what you did this week, it's huge, it's out of the question," she said.
The activists were glued to the London Stock Exchange and climbed on the roof of the Canary War train as part of their latest wave of climate change protests.
Organizers said the protesters were targeted at the financial sector on the last day of the protests "to seek to tell the truth about the devastating impact that industry has on our planet."
Eco-protesters want urgent action to stop climate change and stop cutting biodiversity loss, and urged the government to cut carbon emissions from the UK to zero by 2025.
More than 1,000 people were arrested during protests that began on April 15th, while more than 10,000 policemen were deployed.