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The earliest attestation of the name County Durham was in c. 1100 AD in the form ''Dunelmensischira'' (Durhamshire).

The earliest attestation of the name County Durham was in c. 1100 AD in the form ''Dunelmensischira'' (Durhamshire).

Since County Durham did not appear in the Domesday Book, the first known detailed survey of the county was the Boldon Book, completed 97 years later in 1183. It was taken at the orders of Hugh de Puiset, Bishop of Durham. The Boldon Book contained the earliest known documentation of the [[Washington family]], stating that William de Hertburn (ancestor of [[George Washington]], 1st President of the United States) had held Washington since 1180.

Since County Durham did not appear in the Domesday Book, the first known detailed survey of the county was the Boldon Book, completed 97 years later in 1183. It was taken at the orders of Hugh de Puiset, Bishop of Durham. The Boldon Book contained the earliest known documentation of the [[Washington family]], stating that William de Hertburn (ancestor of [[George Washington]], 1st President of the United States) had held Washington since 1180. The Boldon Book also contains the first reference to coal mining in County Durham, recoding a coal miner at Escomb.<ref>[https://www.thenorthernecho.co.uk/history/mining/coal/3183874.early-coal-mining-1100-1500/ Early Coal Mining 1100- 1500]</ref>

Production of coal in the county peaked in the period from 1913 to 1923, when there were 170,000 miners in the county.

Production of coal in the county peaked in the period from 1913 to 1923, when there were 170,000 miners in the county.

Coal mining in County Durham ended in the 1990s. The last deep coal mine on the County Durham Coalfield was Monkwearmouth Colliery in Sunderland, where the last shift left the pit on 10 December 1993. This marked the end of some 750 years of commercial coal production in the county. The colliery was demolished by explosion in October 1994, and [[Sunderland A.F.C.]]'s home ground, the Stadium of Light, was constructed on the site, opening 3 years later in 1997.

Coal mining in County Durham ended in the 1990s. The last deep coal mine on the County Durham Coalfield was Monkwearmouth Colliery in Sunderland, where the last shift left the pit on 10 December 1993. This marked the end of some 810 years of commercial coal production in the county. The colliery was demolished by explosion in October 1994, and [[Sunderland A.F.C.]]'s home ground, the Stadium of Light, was constructed on the site, opening 3 years later in 1997.

== Administration ==

== Administration ==