This book is a collection of articles written by the eminent scholar and Syrian Orthodox Patriarch Ephrem Barsaum. The "Lighthouse" in the book is meant to refer to the thought of Patriarch Barsaum: like a lighthouse, every researcher, scholar, or reader of Syriac must turn towards it for guidance. The articles in this volume display Barsoum's characteristic erudition and scholarly thoroughness and cover a wide variety of topics, all related to the history of the various Syriac-speaking churches and the churches of Antioch, in addition to other Middle Eastern Churches.