A ceremony will take place at Cardigan Castle today, ahead of a major refurbishment of the site.
The £11m project will revamp the 900-year-old site into a facility for community and recreational use as well as for learning.
Campaigners still need to raise £150,000 to secure the project.
More top news
Rain moving east, will spread across Wales in the first half of the night, some likely heavy.
Rain moving east, heavy at times
The Lesbian, Gay, Bisexual and Transgendered communities in Cardiff are celebrating 30 years of campaigning; as part of LGBT History Month.