The ephemeral architectural pavilions outline representative icons of contemporary architecture, highlighting their relevant role as experimental laboratories for architectural practice. Due to their temporary nature and flexibility of use, these pavilions allow for experimentation with innovative materials, advanced construction techniques, design methods and theoretical concepts. The research is a qualitative study based on analyses of case studies. The review covers the analysis of ephemeral pavilions, identifying the most relevant practices and innovations in the field. The case analyses include 2 examples of temporary pavilions, and 1 installation developed by ICD/ITKE at the University of Stuttgart, focusing on design methods and construction techniques. The research also addresses the distinction between ephemeral pavilions, which create usable spaces for several activities, and temporary installations, which tend to be more contemplative and sculptural. The results indicate that the flexibility and creative freedom provided by ephemeral pavilions allow for the development of functional and dynamic spaces, while temporary installations may focus on creating aesthetic experiences as well as smaller-scale experiments to validate functional concepts (such as products of minimum viable project). Furthermore, these structures demonstrate how the combination of functionality and aesthetics can challenge conventional design and construction practices. The discussion reveals that ephemeral pavilions, combined with advanced design technologies, offer new perspectives and approaches, significantly influencing the evolution of architecture. It can therefore be seen that these pavilions not only work as platforms for experimentation, but also as engines of innovation, contributing to the development of architectural solutions.