Plans have been unveiled to refurbish a visitor centre on the site where rebel leader Owain Glyndwr is thought to have set up his parliament 600 years ago.
The refurbished centre would include an education facility
The group behind the £2.7m project in Machynlleth, Powys, intends to bid for heritage lottery funding.
The Owain Glyndwr Centre tells the story of the Welsh uprising from 1400 but officials say it needs modernising.
Plans include a new building and refurbishing the Grade-I listed Parliament House in the town.
Henry Evans, chairman of the Owain Glyndwr Centre, said Parliament House, home to the visitor centre, was built in about 1460, but it is understood to stand on the site of Glyndwr's old parliament.
"The centre opened in 1981, but 15 years later we felt it was in need of modernising and we have been working on plans ever since," said Mr Evans.
"We want to preserve the historic centre, but it needs modernising."
Mr Evans said the centre would have to find match funding for the project, which could take a few years to raise.
Machynlleth mayor Bob Dunn said the town council backed the proposals.
"It's a long-term plan, but I think it will complement other things in the town," he added.
The refurbished centre would include an educational facility to complement national curriculum studies of Glyndwr's revolt against Henry IV.
Backed by French military aid, Glyndwr took Carmarthen and Cardiff in 1403 from the English and Harlech and Aberystwyth in 1404.
However the tide eventually turned and the revolt was crushed five years later.