Activists dye the water in the famous Trevi Fountain black to highlight climate change. They claim one in four houses in Italy are at risk of flooding.
Rome's mayor Roberto Gualtieri was not impressed by the action in one of the capital's main tourist attractions. "There must be an end to these absurd attacks on our cultural heritage," he wrote on Twitter. The activists were later dragged away by police. The floods in northern Italy have been described as the worst in over a century.