Historical buildings in Wales are threatened by a shortage of workers with the skills to repair and maintain them, a heritage officer has said.
About a third of all buildings in Wales were built before 1919, many of those made of stone.
Many could be lost through "ignorance and a lack of skills", said Carmarthenshire council's Nell Hellier.
The Welsh government said it was working with partners to try and address the issue.
"We have half a million traditional buildings in Wales," said Ms Hellier, Carmarthenshire's senior built heritage officer.
"We need traditional building skills to repair them."
She works at the Tywi Centre, on the Dinefwr estate near Llandeilo, one of the only schools in the UK offering specialist training and advice on skills essential for maintaining historic buildings.
