Claudius Ptolemy composed his 'Geography' in the city of Alexandria, one of the most prominent intellectual centres of the Roman Empire. His work offers a comprehensive description of the known world as well as insight into the practice of scholarly geography during the second century CE. Ptolemy's most important innovation in this field was his use of geographical coordinates to create maps of the world, and his catalogue, with its latitudes and longitudes of thousands of localities, is one of our most valuable sources on the antique 'oikoumene'. Very little is known, however, about the sources and working methods that Ptolemy employed to produce his 'Geography'. This book focuses on Ptolemy's description of the Iberian peninsula and examines two problematic and interlinked topics relating to the origins of the catalogue of localities: Ptolemy's sources and scientific methods on the one hand, and the textual transmission of the 'Geography', from Ptolemy to the extant manuscripts, on the other. --- In der Reihe BERLIN STUDIES OF THE ANCIENT WORLD erscheinen Monographien und Sammelbände aller altertumswissenschaftlichen Disziplinen. Die Publikationen gehen aus der Arbeit des Exzellenzclusters "Topoi. The Formation and Transformation of Space and Knowledge in Ancient Civilizations" hervor, einem Forschungsverbund der Freien Universität Berlin und der Humboldt-Universität zu Berlin sowie den Partnerinstitutionen Berlin-Brandenburgische Akademie der Wissenschaften, Deutsches Archäologisches Institut, Max- Planck- Institut für Wissenschaftsgeschichte und Stiftung Preußischer Kulturbesitz. Die Reihe ist Bestandteil der Publikationsplattform Edition Topoi. Alle Bände der Reihe sind elektronisch unter www. edition- topoi.org verfügbar.