To mark the milestone anniversary, Cadw has a packed schedule of entertainment and activities at its sites across Wales this summer which will showcase all that it has to offer.
I nodi’r garreg filltir, mae gan Cadw amserlen lawn o adloniant a gweithgareddau yn ei safleoedd ledled Cymru yr haf hwn a fydd yn arddangos popeth sydd ganddo i’w gynnig.