PROCEEDINGS OF THE INTERDISCIPLINARY COLLOQIUM ARRANGED BY THE NATIONAL ARCHAEOLOGICAL INSTITUTE AND MUSEUM AT SOFIA AND THE WELSH DEPARTMENT, ABERYSTWYTH UNIVERSITY HELD AT THE NATIONAL ARCHAEOLOGICAL INSTITUTE AND MUSEUM SOFIA, 8 MAY 2010 CONTENTS Preface Celtic - Definitions, Problems and Controversies - SIMON RODWAY The Ancient Historians on the Celtic Kingdom in South-Eastern Thrace - DILYANA BOTEVA Celts, Greeks and Thracians in Thrace during the Third Century BC. Interactions in History and Culture - KAMEN DIMITROV Ancient Texts on the Galatian Royal Residence of Tylis and the Context of La Tene Finds in Southern Thrace. A Reappraisal - JULIJ EMILOV In Search of Tyle (Tylis). Problems of Localization – METODI MANOV The Celtic Tylite State in the Time of Cavarus - LACHEZAR LAZAROV The Mal-Tepe Tomb at Mezek and the Problem of the Celtic Kingdom in South-Eastern Thrace - TOTKO STOYANOV Ancient Place-Names of the Eastern Balkans: Defining Celtic Areas - ALEXANDER FALILEYEV List of authors