It was built on Adam Street in 1853 to serve the Irish community of what was then called 'New Town.'
Attempts to keep it open were unsuccessful until a decision was taken to dismantle the building in 2012 and restore it to its former glory at St Fagan's Museum - brick by brick.
The Vulcan' was one of Cardiff's most recognisable Victorian pubs Credit: St Fagans: National History Museum
People will once again be able to order a drink once it's finished in the next three years.
Builders are restoring the pub back to glory - brick by brick. Credit: ITV Wales
When finished it'll have the original tiles on the front - the same windows that saw generations walk by.