Newport is a city and unitary authority area in south east Wales, on the River Usk close to its confluence with the Severn Estuary, 12 miles (19 kilometres) northeast of Cardiff. At the 2011 census, it was the third largest city in Wales, with a population of 145,700. The city forms part of the Cardiff-Newport city, with a population of 1,097. Newport has actually been a port since medieval times, when the initial Newport Castle was constructed by the Normans. The town outgrew the earlier Roman town of Caerleon, right away upstream, as well as obtained its initial charter in 1314. It expanded considerably in the 19th century, when its port came to be the emphasis of coal exports from the eastern South Wales Valleys. Up until the surge of Cardiff from the 1850s, Newport was Wales' biggest coal-exporting port. Newport was the site of the last large-scale armed insurrection in Britain, the Newport Increasing of 1839 led by the Chartists. This was led by the Chartist John Frost which brought about the re-branding of the Duffryn High School right into John Frost School. In the 20th century, the docks decreased in significance, yet Newport stayed a vital production and design centre. It was given city status in 2002. Newport organized the Ryder Cup in 2010 and was the place for the 2014 NATO summit.