Stirling is a city and former ancient burgh in Scotland, and is at the heart of Scotland. The city is clustered around a large fortress and medieval old-town beside the River Forth. Historically it was strategically important as the "Gateway to the Highlands", with its position near the boundary between the Scottish Lowlands and Highlands, and its crossing of the Forth, the nearest to the river mouth.
Originally a Stone Age settlement, Stirling has been strategically significant since at least the Roman occupation of Britain, due to its naturally defensible crag and tail hill (latterly the site of Stirling Castle), and its commanding position at the foot of the Ochil Hills on the border between the Lowlands and Highlands, at the lowest crossing point of the River Forth. It remained the river's lowest crossing until the construction of the Kincardine Bridge further downstream in the 1930s. It is supposed that Stirling is the fortress of Iuddeu or Urbs Giudi where Oswiu of Northumbria was besieged by Penda of Mercia in 655, as recorded in Bede and contemporary annals.