Established in 2012, the Barcelona Office of Citizen Science’s mission is to support citizen science in the city of Barcelona (Spain). Since its creation, the office has advised, accompanied, and promoted citizen science projects active in the city and its Metropolitan Area resulting in the involvement of around 13,000 residents and schoolchildren, who have collected more than 10,000 valuable data for scientific research. This is one of the few examples of citizen science structures at local level in Europe. The office plays a key role in connecting the public administration with local initiatives, researchers, and new civic and cultural agents, while providing services such as dissemination of activities and promotion of spaces for mutual learning. 50 Visit the project website