The geography of Scotland in the Middle Ages covers all aspects of the land that is now Scotland, including physical and human, between the departure of the Romans in the early fifth century from what are now the southern borders of the country, to the adoption of the major aspects of the Renaissance in the early sixteenth century. Scotland was defined by its physical geography, with its long coastline of inlets, islands and inland lochs, high proportion of land over 60 metres above sea level and heavy rainfall. It is divided between the Highlands and Islands and the Scottish Lowlands, which are subdivided by geological features including fault lines, mountains, hills, bogs and marshes. This made communications by land problematic and raised difficulties for political unification, but also for invading armies.
Roman occupation of what is now southern Scotland seems to have had very little impact on settlement patterns, with Iron Age hill forts and promontory forts in the south and Brochs and wheelhouses in the north, continuing to be occupied in the early medieval period. The study of place names and archaeological evidence indicates a pattern of early medieval settlement by the Picts, most densely around the north-east coastal plain; early Gaelic settlement was predominately in the western mainland and neighbouring islands. Anglian settlement in the south-east reached into West Lothian, and to a lesser extent into south-western Scotland. Later Norse settlement was probably most extensive in Orkney and Shetland, with lighter settlement in the Western Islands.
From the reign of David I (r. 1124–1153), there is evidence of burghs, particularly on the east coast, which are the first identifiable towns in Scotland. Probably based on existing settlements, they grew in number and significance through the medieval period. More than 50 royal burghs are known to have been established by the end of the thirteenth century and a similar number of baronial and ecclesiastical burghs were created between 1450 and 1516, acting as focal points for administration, as well as local and international trade. In the early Middle Ages the country was divided between speakers of Gaelic, Pictish, Cumbric and English. Over the next few centuries Cumbric and Pictish were gradually overlaid and replaced by Gaelic, English and Norse. From at least the reign of David I, Gaelic was replaced by French as the language of the court and nobility. In the late Middle Ages Scots, derived mainly from Old English, became the dominant language.
In the middle of this period, through a process of conquest, consolidation and treaty, the boundaries of Scotland were gradually extended from a small area under direct control of the kings of Alba in the east, to almost its modern borders. For most of the medieval era the monarchy and court was itinerant, with Scone and Dunfermline acting as important centres and later Roxburgh, Stirling and Perth, before Edinburgh emerged as the political capital in the fourteenth century. Largely as a result of Viking raids from about 800, Iona declined as a religious centre. Despite royal attempts to establish a new religious centre at Dunkeld, it was St. Andrews on the east coast, close to the heartland of Pictish settlement, that emerged as the most important religious focus of the kingdom.
Physical
Modern Scotland is half the size of England and Wales in area, but with its many inlets, islands and inland lochs, it has roughly the same amount of coastline at . Only a fifth of Scotland is less than above sea level. Its east Atlantic position means that it has very heavy rainfall, today about per year in the east and more than in the west. This encouraged the spread of blanket peat bog, the acidity of which, combined with high levels of wind and salt spray, made most of the islands treeless. The existence of hills, mountains, quicksands and marshes made internal communication and conquest extremely difficult and may have contributed to the fragmented nature of political power.C. Harvie, Scotland: a Short History (Oxford: Oxford University Press, 2002), , pp. 10–11. The early Middle Ages was a period of climate deterioration, with a drop in temperature and an increase in rainfall, resulting in more land becoming unproductive.P. Fouracre and R. McKitterick, eds, The New Cambridge Medieval History: c. 500-c. 700 (Cambridge: Cambridge University Press, 2005), , p. 234. This was reversed in the period c. 1150 to 1300, with warm dry summers and less severe winters allowing cultivation at much greater heights above sea level and making land more productive. In the late Middle Ages, average temperatures began to reduce again, with cooler and wetter conditions limiting the extent of arable agriculture, particularly in the Highlands.J. Steane, The Archaeology of Medieval England and Wales (London: Taylor & Francis, 1985), , p. 174.
The defining factor in the geography of Scotland is the distinction between the Highlands and Islands in the north and west and the Lowlands in the south and east. The Highlands are further divided into the Northwest Highlands and the Grampian Mountains by the fault line of the Great Glen. The Lowlands are divided into the fertile belt of the Central Lowlands and the higher terrain of the Southern Uplands, which included the Cheviot Hills, over which the border with England came to run by the end of the period.R. Mitchison, A History of Scotland (London: Routledge, 3rd edn., 2002), , p. 2. Some of these regions were further divided by mountains, major rivers and marshes.B. Webster, Medieval Scotland: the Making of an Identity (St. Martin's Press, 1997), , pp. 9–20. The Central Lowland belt averages about in width,World and Its Peoples (London: Marshall Cavendish), , p. 13. and because it contains most of the good quality agricultural land and has easier communications, could support most of the urbanisation and elements of conventional medieval government. The Southern Uplands, and particularly the Highlands were economically less productive and much more difficult to govern. This provided Scotland with a form of protection, as minor English incursions had to cross the difficult Southern Uplands;A. G. Ogilvie, Great Britain: Essays in Regional Geography (Cambridge: Cambridge University Press, 1952), p. 421. two major attempts at conquest by the English, under Edward I and then Edward III, were unable to penetrate the Highlands, from where potential resistance could reconquer the Lowlands.R. R. Sellmen, Medieval English Warfare (London: Taylor & Francis, 1964), p. 29. But it also made those areas problematic to govern for Scottish kings and much of the political history of the era after the wars of independence centred on attempts to resolve problems of entrenched localism.J. Wormald, Court, Kirk, and Community: Scotland, 1470–1625 (Edinburgh: Edinburgh University Press, 1991), , pp. 39–40.
Settlement and demography
Roman influence beyond Hadrian's Wall does not appear to have had a major impact on settlement patterns, with Iron Age hill forts and promontory forts continuing to be occupied through the early medieval period.K. J. Edwards and I. Ralston, Scotland after the Ice Age: Environment, Archaeology and History, 8000 BC – AD 1000 (Edinburgh: Edinburgh University Press, 2003), , p. 175. These often had defences of dry stone or timber laced walls, sometimes with a palisade.K. J. Edwards and I. Ralston, Scotland after the Ice Age: Environment, Archaeology and History, 8000 BC – AD 1000 (Edinburgh: Edinburgh University Press, 2003), , pp. 224–5. The large numbers of these forts has been taken to suggest peripatetic monarchies and aristocracies, moving around their domains to control and administer them. In the Northern and Western Isles the sites of Iron Age Brochs and wheel houses continued to be occupied, but were gradually replaced with less imposing cellular houses.K. J. Edwards and I. Ralston, Scotland after the Ice Age: Environment, Archaeology and History, 8000 BC – AD 1000 (Edinburgh: Edinburgh University Press, 2003), , p. 226. There are a handful of major timber halls in the south, comparable to those excavated in Anglo-Saxon England and dated to the seventh century.K. J. Edwards and I. Ralston, Scotland after the Ice Age: Environment, Archaeology and History, 8000 BC – AD 1000 (Edinburgh: Edinburgh University Press, 2003), , p. 227. In the areas of Scandinavian settlement in the Islands and along the coast a lack of timber meant that native materials had to be adopted for house building, often combining layers of stone with turf.J. Chapelot and R. Fossier, The Village and House in the Middle Ages (Berkeley, CA: University of California Press, 1985), , p. 274.
Place-name evidence suggests that the densest areas of Pictish settlement were in the north-east coastal plain: in modern Fife, Perthshire, Angus, Aberdeen and around the Moray Firth, although later Gaelic migration may have erased some Pictish names from the record.J. Haywood, The Celts: Bronze Age to New Age (London: Pearson Education, 2004), , p. 116. Early Gaelic settlement appears to have been in the regions of the western mainland of Scotland between Cowal and Ardnamurchan, and the adjacent islands, later extending up the West coast in the eighth century.B. Yorke, The Conversion of Britain: Religion, Politics and Society in Britain c.600–800 (Pearson Education, 2006), , p. 53. There is place name and archaeological evidence of Anglian settlement in south-east Scotland reaching into West Lothian, and to a lesser extent into south-western Scotland.D. W. Harding, The Iron Age in Northern Britain: Celts and Romans, Natives and Invaders (London: Routledge, 2004), , p. 226. Later Norse settlement was probably most extensive in Orkney and Shetland, with lighter settlement in the Western Islands, particularly the Hebrides and on the mainland in Caithness, stretching along fertile river valleys through Sutherland and into Ross. There was also extensive settlement in Bernicia stretching into the modern borders and Lowlands.J. Graham-Campbell and C. E. Batey, Vikings in Scotland: an Archaeological Survey (Edinburgh: Edinburgh University Press, 1998), , pp. 37–41.