Northumberland role in the Industrial Revolution from the 18th century on. Many coal mines operated in Northumberland until the widespread closures in the 1970s and 1980s. Collieries operated at Ashington, Bedlington, Blyth, Choppington, Netherton, Ellington and Pegswood. The region's coalfields fuelled industrial expansion in other areas of Britain, and the need to transport the coal from the collieries to the Tyne led to the development of the first railways. Shipbuilding and armaments manufacture were other important industries before the deindustrialisation of the 1980s. Northumberland remains largely rural, and is the least-densely populated county in England. In recent years the county has
Međimurje County Međimurje County Međimurje County (; ) is a triangle-shaped county in the northernmost part of Croatia, roughly corresponding to the historical and geographical region of Međimurje. Despite being the smallest Croatian county by size, it is the most densely populated one (not including the City of Zagreb). The county seat is Čakovec, which is also the largest city of the county. The county borders Slovenia in the north-west and Hungary in the east, with about 30 kilometers of Slovenian territory separating it from Austria. The south-eastern corner of the county is near the town of Legrad and the confluence of