My project focuses on the borders of Attica; more specifically, on the regional, cultural and economic history of the borderland. The frontiers of Attica have never been the object of a systematic geo-historical study. The present project seeks to fill this important gap by offering the first comprehensive study of the successive delimitations of the territory of Attica, by documenting their causes and by examining their impact on the political, religious and economic life of the borderlands from the Archaic down to the Roman period. I am hoping that my examinations will shed new light on life in Attica, on the evolution of a borderland identity (cultural, economical), and that they will act as a point of reference for the study of borders in the Greek World.