For hundreds of years, it has stood beside the muddy creeks and may once have even hidden smugglers' booty.
Now there are fears over the state of the Coal Barn at Thornham, near Hunstanton, which is almost all that remains of the village's once bustling harbour.
Minutes from last month's parish council meeting say there are "serious concerns" over the building and the clerk will be contacting its owner to discuss repairs.
Parish councillor Andrew Jamieson said: "The parish council is worried about the structure, it is deteriorating.
"It's being held up by RSJs [reinforced steel joists] and bits of masonry are falling off it.
"We're looking at ways to support the owner to preserve the Coal Barn, because it's such an iconic asset."
The Coal Barn dominates the approaches to the harbour after Staithe Lane peters out into a muddy track.
But the building, which has featured in countless photographs, is succumbing to the elements.
High spring tides bring the sea lapping up to its pair of tall wooden doors.
Winter gales and salty air have eroded the masonry between its haphazard courses of brick, flint and chalk, which have been patched up here and there over the years.
Timbers are also decaying, with gaps appearing, while a post that punctuates the brickwork appears to have rotted through where it meets the soggy ground.
Plans to turn the Coal Barn into an art studio were given the go-ahead by West Norfolk Council in 2007, but the scheme did not materialise.
In 2014, plans to turn the building into a house were turned down on appeal on the grounds that the property was at risk from flooding, despite standing on a slightly-raised knoll.
In 2015, the art studio project seemed set to be revived when the council agreed a lawful development certificate for it, meaning the project could still go-ahead.
But the artists have not yet set up their easels and the building's future remains uncertain.
LANDMARK BARN'S RICH PAST
Built 300 years ago, the Coal Barn was once part of a thriving harbour, which boasted a granary and a windmill and brought a healthy trade to Thornham.
Over the years, the muddy creek that feeds it has silted up to the point where just a handful of fishing boats and pleasure craft can now use it.
Village legend has it the Coal Barn was also used by smugglers, who brought in chests of tea and barrels of spirits despite the heavily-armed navy cutters which patrolled offshore, in a bid to sink the illicit trade and the dragoons and revenue men billeted in nearby inns.
Some also believe a tunnel may have been dug under the marsh that connects it to the nearby Lifeboat Inn, through which contraband could be brought ashore away from prying eyes.
As its name suggests, the barn was built to store coal shipped from the collieries of the north-east to keep villagers' fires alive through the harsh coastal winters.
It was last served by the Jessie Mary, a twin-masted sailing ship of 100 tons owned by Nathaniel Woods, who is remembered in two plaques set into the lychgate of Thornham's All Saints Church.
Woods would set sail on the outward leg with a hold full of grain, loading up with coal for the return voyage.
By the time of her last voyage, in 1914, it would have been cheaper to bring coal to nearby stations such as Hunstanton by rail, before bringing it to Thornham via horse-drawn wagons.
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