Opuscula is published by the Swedish Institutes at Athens and Rome, with the aid of a grant from the Swedish Research Council. Distributed by Eddy.se AB. View journal at ERIH PLUS. All content available with open access. Pergamos. An unexplored fortified site in north-eastern Greece By Patrik Klingborg (Uppsala University), Georgia Galani (Swedish Institute at Athens), Jesper Blid (Independent scholar), Stavroula Dadaki (Ephorate of Antiquities of Kavala) & Penelope Malama (Ephorate of Antiquities of Kavala) Abstract The aim of this article is to present the first results of a project investigating the hitherto unexplored site of Pergamos, located on a hill known as Koules/Alonaki just to the south of modern Moustheni in the Pieria valley. The site has a long history, with the earliest traces of human activity dating to the Late Bronze Age and the first visible architectural remains—impressive and well-preserved fortifications built in a stack-work technique—originating in the Late Archaic period. Following this, surface finds testify to activity and habitation throughout the centuries until a substantial strengthening of the defensive walls during Late Roman or medieval times, before the site was abandoned at a currently unknown point. To achieve the aim the article begins with an introduction to the site…