It found that the historic environment contributes approximately £840 million to Wales's gross value added, some £1.8billion in respect of output and supports 30,000 full-time equivalent jobs.
Canfuwyd bod yr amgylchedd hanesyddol yn cyfrannu tua £840 miliwn at werth ychwanegol crynswth Cymru, tua £1.8 biliwn o ran allbwn ac yn cynnal 30,000 o swyddi cyfwerth ag amser llawn.