»¿¿¿ bauhaus« (selam bauhaus) means »hello bauhaus« in Amharic, one of the most important languages in Ethiopia. Visually, one could also interpret the Amharic letters as "Why Bauhaus" to question the overuse of this label during the Bauhaus Centennial in 2019. So, why Bauhaus? 100 years ago, the teaching of architecture and urban design at the Bauhaus responded to rapid changes in society and their impact on the built environment. The ambitions and methods of the historical Bauhaus can still inspire us in the present day: Today, facing global climate change and human migration, these themes are more pressing than ever. Through the Emerging City Lab Addis Ababa (ECL-AA), the Bauhaus-Universität Weimar and the Ethiopian Institute of Architecture, Building Construction and City Development (EiABC) at Addis Ababa University established a joint lab. Combining innovation and social responsibility through experiments with building materials, practices and planning technologies beyond cultural, social, and disciplinary boundaries, this publication shows educational and research projects that emerged from the collaboration. In 2019 they were presented in the exhibition »¿¿¿ bauhaus (selam bauhaus) - hello bauhaus« on the occasion of the centenary of the Bauhaus and the 65th anniversary of the EiABC.