Norwich Central Library blaze remembered 20 years on
1 August 2014 Last updated at 17:53 BST
On 1 August 1994 a fire at Norwich Central Library destroyed thousands of historical documents and more than 100,000 books.
One hundred and fifty firefighters tackled the blaze at its height, with smoke being seen 20 miles away.
Twenty years on, the Millennium Library in the city's Forum building is the most visited in the UK.
BBC Look East's Mike Liggins speaks to workers at the former library about what they saw on that tragic day.