Scotland in the modern era to become a cattle breed of worldwide reputation. Scotland was already one of the most urbanised societies in Europe by 1800. The industrial belt ran across the country from southwest to northeast; by 1900 the four industrialised counties of Lanarkshire, Renfrewshire, Dunbartonshire, and Ayrshire contained 44 per cent of the population. Glasgow and the River Clyde became a major shipbuilding centre. Glasgow became one of the largest cities in the world, and known as "the Second City of the Empire" after London. Shipbuilding on Clydeside (the river Clyde through Glasgow and other points) began when the first small yards were
Geography of Scotland in the Middle Ages burghs, the late Middle Ages saw the proliferation of baronial and ecclesiastical burghs; 51 were created between 1450 and 1516. Most were much smaller than their royal counterparts, and excluded from international trade they acted mainly as local markets and centres of craftsmanship. There are almost no written sources from which to re-construct the demography of early medieval Scotland. Estimates have been made of a population of 10,000 inhabitants in Dál Riata and 80–100,000 for Pictland, which was probably the largest region. It is likely that the fifth and sixth centuries saw higher mortality rates owing to the appearance of