Few issues concerning religious freedom provoke so much controversy and debate as the extent to which religious symbols should be protected in the public sphere and the workplace. This book provides the first sustained philosophical analysis of the concepts at issue in this debate, as well as covering all the major recent cases brought under Article 9 of the European Convention of Human Rights, including the landmark judgment Eweida v UK. In particular, it gives a clear presentation of the current state of the case-law, grounding it, in a unique contribution to the debate, in an investigation of its philosophical underpinnings. Particular attention is paid to different functions of the symbol and their theoretical background, with new emphasis on the role of the symbol in bearing witness to faith. This book will open up new vistas for philosophers of religion and legal theorists alike.