A group have started work rebuilding a vandalised wall that commemorates the drowning of a village near Bala.
Police are investigating criminal damage done to the wall on the A487 near Llanrhystud.
The wall reads "Cofiwch Dryweryn" or "Remember Tryweryn", in reference to the drowning of the village of Capel Celyn in 1965, making way for a reservoir to supply Liverpool.
Dyfed-Powys Police said the memorial had been "repeatedly damaged" in recent months and that vandalism was causing "significant distress both locally and nationally".
Inspector Chris Fraser said officers are currently at the scene gathering evidence.
Stones from the upper half of the wall appear to have been knocked from the structure, destroying the top half of the message.
Assembly Member for Ceredigion, Elin Jones, tweeted that the vandalism was "disgraceful" and asked "what is the solution" to protect the wall.