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
Architecture of Scotland classical models. Edinburgh's New Town was the focus of this classical building boom in Scotland. From the mid-eighteenth century it was laid out according to a plan of rectangular blocks with open squares, drawn up by James Craig and built in strong Craigleith sandstone which could be precisely cut by masons. Most residences were built as tenement flats, where, in contrast to contemporary building in England where buildings were divided vertically into different houses, they were divided horizontally, with different occupants sharing a common staircase. The smallest might have only one room, the largest several bedrooms and drawing rooms. This