Migration as a result of war, economic demise, and climate change have turned European cities into ‘arrival cities’ in the past years. It is now pivotal for cities to develop structural and social strategies for a dignified and socially sustainable integration – or co-existence – in the long term. Architecture and urban planning must respond to these new conditions and develop (residential) typologies that allow for diversity and civic empowerment. A discussion on projects implemented and planned across Europe that have tested the potentials and limitations of this challenge, and on cooperations between the municipal administrations, the private sector, and civil society.