It looks after thousands of listed buildings, monuments and assets and helps preserve Wales' heritage.
Now, Cadw is marking its own bit of history - its 40th birthday - 75 years since the first historical buildings were listed in Wales.
Meaning "protect" or "to keep" in Welsh, Cadw was set up in the autumn of 1984, a joint agency of the Welsh Office and Wales Tourist Board, with the aim of conserving and promoting the nation's heritage to visitors.
It took on responsibility for 10,500 listed buildings and 2,700 monuments from the Department of the Environment and - since then - another 20,000 assets have been given protection through listing.
more
https://www.bbc.co.uk/news/articles/ce381yv7l7wo?IYA-reg=49560bcd-5a9c-47f0-8fc5-ba2e71710589