The ImpleMentoring project is a partnership between 12 European cities and MigrationWork CIC that aims to support cities in implementing the principles of the EUROCITIES Integrating Cities Charter. The project promotes mutual learning between cities in four areas of integration such as enhancing public perception of diversity and participation in local policy-making. Cities take the role of either an implementing city that works to improve its practices in an area, or a mentor city that provides support to an implementing city to identify changes needed and develop a roadmap to achieve these changes. Output from the project includes benchmarks on best practices in each integration area and toolkits to share these benchmarks across Europe.