Scotland during the Roman Empire of the geography of Scotland had extended to the "Hebudes" (The Hebrides), "Dumna" (probably the Outer Hebrides), the Caledonian Forest, and the Caledonians. Ptolemy, possibly drawing on earlier sources of information as well as more contemporary accounts from the Agricolan invasion, identified 18 tribes in Scotland in his "Geography", but many of the names are obscure. His information becomes much less reliable in the north and west, suggesting early Roman knowledge of these area was confined to observations from the sea. Famously, his coördinates place most of Scotland north of Hadrian's Wall bent at a right angle, stretching due eastward
Vestiges of the Gallo-Roman wall, Grenoble Grenoble, J.B. Sajou, Paris, 1814 Vestiges of the Gallo-Roman wall, Grenoble The Vestiges (traces) of the Gallo-Roman wall are the remains of a fortification, constructed in Grenoble, France (formerly called Cularo) at the end of the 3rd century, under the reign of the Emperors Diocletian and Maximian. The status of Civitas marked the city of Cularo as an administrative capital of the Roman Empire. The Gallo-Roman wall was 1,150 meters in length, and had 39 semi-circular watchtowers which were 7.5 meters in diameter. It had two monumental gates decorated by inscriptions identifying the two Roman emperors. The Gallo-Roman wall played