Its red and white stripes make it one of Norfolk's most recognisable landmarks - but 50 years ago today Happisburgh Lighthouse had a distinctly gloomier cast.
On September 6, 1971 - for one day only - the lighthouse tower wore a coat of jet black bitumen.
Patrick Tubby, chairman of Happisburgh Lighthouse Trust, said the tower was painted black when it was run by Trinity House in a not-too successful effort at sealing its surface, when John 'Jack' Siely was lighthouse keeper.
Mr Tubby said: "In 1971 he was asked to assist in painting a layer of black bitumen which was discovered in a later scrape-down. The black was only visible for a day before the completion of that repaint.
"The coat of bitumen was no doubt an attempt to waterproof the tower, but this seemed to create a non-permeable seal that water trapped in the masonry could not escape.
"This was a common practice with Trinity House lighthouses at the time."
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