ETHOS, the European Typology on Homelessness and Housing Exclusion, was launched by FEANTSA in 2005. Following a two-year review process, it became the main reference for the study of homelessness in the European Union. ETHOS is a conceptual and analytical tool that also provides a framework for debate and reflection on how to address housing exclusion. FEANTSA states that “ETHOS is an open exercise which makes abstraction of existing legal definitions in the EU Members States”, providing a common conceptual framework that is to be adapted to the uniqueness of each European country.