This volume is based on possibly the biggest single Europe-wide project in urban history. In 1955 the International Commission for the History of Towns established the European historic towns atlas project in accordance with a common scheme in order to encourage comparative urban studies. By 2014 the project consisted of over 500 individual publications from over 18 different countries across Europe. The focus of the volume is on the question of how seigneurial power influenced the creation of towns in medieval Europe and of how this process in turn influenced urban form. By presenting case studies by leading researchers from different European countries, this volume combines findings that were hitherto not available in English. The book also shows how work on urban topography integrates the approaches of the historian, archaeologist and historical geographer. The narrative of medieval urbanization becomes enriched and the volume is a genuine contribution to European studies.