The Sagalassos Archaeological Research Project has made interdisciplinary practices part of its scientific strategy from the very beginning. The project is internationally acknowledged for important achievements in this respect. Aspects of its approach to ancient Sagalassos can be considered ground-breaking for the archaeology of Anatolia and the wider fields of classical and Roman archaeology. Now that its first project director, Professor Marc Waelkens - University of Leuven -, is at the stage of shifting practices, from an active academic career to an active academic retirement, this volume represents an opportunity to reflect on the wider impact of the Sagalassos Archaeological Research Project. The contributors to the honorific publication build on the methods and practices of interdisciplinary archaeology from a wide variety of angles, in order to highlight the crucial role of interdisciplinary research for creating progress in the interpretation of the human past or nurture developments in their own disciplines. In particular, the contributors consider how the parcours of the Sagalassos Project helped to pave their ways.