Cadw
Welsh Government
Plas Carew
Uned 5/7 Cefn Coed
Parc Nantgarw
Cardiff
CF15 7QQ
Tel:01443 336000
Email: cadw@wales.gsi.gov.uk
Website: http://cadw.gov.wales
Gwynedd Archaeological Trust
Craig Beuno
Garth Road
Bangor
Gwynedd
LL57 2RT
Tel:01248 352535
Email:gat@heneb.co.uk
Website: www.heneb.co.uk
Royal Comission on the Ancient and Historical Monuments of Wales
Ffordd Penglais
Aberystwyth
SY23 3BU
Tel: 01970 621200
Email: chc.cymru@cbhc.gov.uk
Website: https://rcahmw.gov.uk
Snowdonia National Park
National Park Office,
Penrhyndeudraeth,
Gwynedd
LL48 6LF
Tel: 01766 770274
Email: parc@eryri-npa.gov.uk
Website: http://www.eryri-npa.gov.uk/
National Slate Museum
Llanberis,
Caernarfon
LL55 4TY
Tel: 02920 573700
Email: slate@museumwales.ac.uk
Website: https://museum.wales/slate/
National Trust
Wales Regional Office
Priest House
Tredegar House
Newport
South Wales
NP10 8YW
Tel: 01633 811659
Email: wa.customerenquiries@nationaltrust.org.uk
Website: www.nationaltrust.org.uk
And all communities, businesses and individuals in the area.