A former mining engine house in Swansea dating back to the 1817 is to undergo conservation work to preserve it for future generations.
Scott's Pit in Birchgrove has been unused since 1930 and has become overgrown and in need of repair.
Swansea council said work will be carried out on the listed building and scheduled ancient monument over a five-week period.
It said it was "serious" about preserving the city's heritage.
The mine was originally opened by Captain John Scott during the 1770s and after a relatively short life it closed in 1840.
It faced problems with flooding when it was operational and so the engine house was fitted with a Cornish beam engine to pump water from the mine workings.
It stood derelict until 1873 when it was re-opened and used only as a pumping shaft. It was finally closed in 1930.
A spokesman for Swansea council, which owns the engine house, said the conservation work would start after details were finalised with Cadw.
"This will help conserve the structure at the heart of a green space that's well-used by the local community," he added.