In our time, change is a constant companion. Fading images, perhaps nostalgically idealized in hindsight, often evoke a sense of melancholy. Who can still remember the railway maintenance works, the operational facility, and the freight and shunting yard in the Europaviertel in Frankfurt am Main? We pay tribute to this railway city and shed light on its transformation and historical roots. Similarly, the area of the fair, which can be referred to as the fair district, is examined: an exciting ensemble designed by various outstanding architects, yet known to only a few people outside of the fair visitors. The book addresses the planning and construction history and its outcomes. The interplay of changing framework conditions and many actors with differing interests is particularly illustrated by a conversation with a contemporary witness. Images by photographer Eibe Sönnecken depict the state of the Europaviertel in 2021 and 2022, rounding off the examination along with fundamental recommendations for future urban development projects at the end.