This seminar presents current and future sustainability issues in European cities. It provides the platform for a shared discussion on how to respond to these economic, social and environmental challenges in order to achieve sustainable urban development in the wider European region. The seminar consists of two thematic panels and a final session. The two thematic panels focus on: 1) energy, transport and technologies in cities and 2) ageing and accessibility in cities. During the final session, conclusions and recommendations from the thematic panel discussions are drawn with the aim to identify potential joint activities on sustainable urban development.