It's a public policy tool to engage and increase public participation in local government decision-making by funding ideas generated and debated by the population. The Municipality of Lisbon was the first European capital to implement Participatory Budgeting in 2008, through Deliberation No. 506/CM/2008 approved at a City Council meeting, as published on July 9, 2008, in the 3rd supplement to Municipal Bulletin No. 751.