This false identification has had important historical consequences. Modern writers have on this supposition spoken of the Portuguese as a distinct branch of the Celtic population of the Iberian peninsula identical with the tribe of Lusitanians spoken of by Strabo. They have further identified them with the Lusitanians who struggled so gallantly against the Roman Republic under the leadership of Punicus and Viriathus; they have found passages in the Latin historians describing the Lusitanians, and have moralized upon the manner in which the characteristics of the ancient Lusitanians re-appear in the modern Portuguese. The identity of two nations must consist in proving their perfect succession in either race or territory, and in neither respect can the identity be shown in the present instance. The Celtic tribe of Lusitanians dwelt, according to Strabo, in the districts north of the Tagus, while the Lusitania of the Latin historians of the Republic undoubtedly lay to the south of that river though it was not used as the name of a province until the time of Augustus, when the old division of the peninsula into Hispania Citerior and Hispania Ulterior was superseded by the division into Betica, Tarraconensis, and Lusitania. Neither in this division, nor in the division of the peninsula into the five provinces of Tarraconensis, Carthaginensis, Betica, Lusitania, and Gallicia, under Hadrian, was the province called Lusitania coterminous with the modern kingdom of Portugal. Under each division the name was given to a district south of the Tagus, and therefore not embracing the modern provinces of the Entre Minho e Douro, Trasos-Montes, and Beira. [Illustration: SPECIMEN OF ROMAN ARCHITECTURE. (_The Castellum of Q. Sertorius at Evora._)]