The North East's coal mining past is an important part of our heritage, but how much do you know about its effect on the area where you live?
At the industry's peak, there were 400 pits, employing a quarter of a million people.
The records of the Durham Miners' Association from that time are held at Sunderland University.
Now for the first time, the whole collection is available on the internet. It is attracting interest from scholars all over the world. Lucy Taylor has been to see it.
More top news
Predominantly dry over the coming few days with variable cloud & some sunshine. Cool start but daytime temperatures should recover a little
War veterans taking part in the walk of Britain got a singing send-off from school pupils in Northumberland.
A cast of the skull of St Bede - the English scholar who is considered to be the founder of English history - will go on display in Jarrow.