As a part of the activities that will celebrate the 25th anniversary of the European Union Prize for Contemporary Architecture - Mies van der Rohe Award, this catalogue explains the value of the Prize as a platform for discovery and debate about two main topics: the historical value of the Prize as a demonstration of the significance of European architecture, and the Award's role as a mechanism for bringing up topics of concern in today's European architecture, and as a process that contributes to building an architectural and urban discourse, both in Europe and throughout the world. The works of the last 25 years are essential tools for defining the future in the upcoming years.