This volume consists of the proceedings of an interdisciplinary PhD workshop that took place at the Autonomous University of Barcelona on the 23rd, 24th and 25th of November 2016, which revolved around the issue of contacts between cultures during Antiquity and the Middle Ages. The participants - who come from diverse academic disciplines - analyse multiple aspects of these encounters, relationships and conflicts between different societies, from trade and cultural exchange to war and extermination, throughout ancient and medieval history. The volume is composed of nineteen papers written in Spanish, Italian and English, which are divided into five main categories: ‘Acculturation and Cultural Exchanges’, ‘Contact between Religions’, ‘War, Colonisation and Migration Movements’, ‘Linguistics and Literature’ and ‘Economy and Urbanism’.