The Coal Exchange in Cardiff and the Navigation Colliery complex in Crumlin have been named in the list Top Ten Most Endangered Buildings 2014.
Following a national appeal for nominations, The Victorian Society published the list in the effort to save the buildings from demolition or further neglect.
The Coal Exchange was used a live music venue in the capital, and originally, a market floor for trading coal.
It was reputedly there that the first recorded million-pound deal was made. The 19th Century Grade II-listed building was closed last year by Cardiff Council after it was declared unsafe and in imminent danger of collapse.
Locals set up a petition last year to try and save the building from demolition.
The Victorian Society is now calling on Cardiff Council to carry out a thorough heritage assessment to restore, what it calls, an important part of both Wales’ and Cardiff’s history.
Chris Costelloe, Director of the Victorian Society, said:
“Once again the number of nominations from the public has demonstrated that it cares about preserving Victorian and Edwardian buildings. Those we selected for the Top Ten are those in the most urgent need of help now, but they also illustrate the problems faced by many more buildings around the country."
The Navigation Colliery was one of the earliest collieries in South Wales to be built in brick rather than local stone and was a show-pit of the period with high quality buildings and up-to-date machinery.
The pit closed in 1967 and has been disused ever since. In 2009, a proposed redevelopment as housing fell through due to the financial crisis.
A local community group, now plans to restore the buildings for commercial and community use, creating jobs and an education centre as well as green electricity generation.