Over the last few decades, European metropolises have changed their face. Turning their activities towards services and especially tourism, whether business or leisure. Let's take a look back at the opportunities, ambitions and decisions that have led to these profound changes. This analysis will be completed by metropolises' point of view on themselves on their territories' development. Accessibility, urban development, structuring projects, development of the cultural offer... many factors have enriched the landscape of these destinations, attracting new customers to boost the hotel market.