Preseli Pembrokeshire Assembly Member Paul Davies has visited Cardigan Castle to learn more about plans to restore the building.
Despite working in the town for many years, Mr Davies had never been able to enter the castle before.
"It was in private ownership until 2003 and is now only open to the public on a limited basis when volunteers are working on the grounds so it was a real privilege to get inside at last," said Mr Davies. "It's such a landmark building in such a key location in the town. It was wonderful to finally get inside."
The castle was built in 1110 and was the site of Wales' first National Eisteddfod. The Cadwgan Building Preservation Trust, who gave Mr Davies a guided tour, is now working on a bid for £4.5 million in Heritage Lottery Funding to restore the castle.
The total project will cost £9 million and aims to restore full public access and to make the castle a place to celebrate Welsh culture once again.
"Cardigan Castle is incredibly important to Welsh heritage," added Mr Davies.
"This is an important project, not only to west Wales' tourist industry but to the whole of Wales.
"I fully support Cadwgan Trust's plans and hope that they are successful in gaining in more grants. It would be great to see the Castle opened up for us all to enjoy."