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Oystermouth Castle conservation

Oystermouth Castle dates back to the 12th century and has undergone extensive conservation work in recent years.

In autumn of 2010, work began to undertake essential works to conserve the castle structure. The £3.1 million partnership project was funded by the Heritage Lottery Fund, Welsh Government Cadw and Visit Wales, European Regional Development Funding (ERDF) and the City and County of Swansea, with great support from the Friends of Oystermouth Castle, a locally formed volunteer group.

The main contractor for the project was WRW Construction Ltd, Llanelli and the architects were Davies Sutton Associates, Cardiff.

12th -14th century Oystermouth Castle has long been a forgotten, rotting historic monument which in its past has seen the likes of Kings, Lords and Ladies residing within its thick stone walls. Originally built as a stronghold and to keep people out, 2010 marked a new era in the history of the castle.

The conservation work was supported by the Heritage Lottery Fund, Cadw, the City and County of Swansea and Friends of Oystermouth Castle.


Works started to construct new access points and footways to help get a wide range of people into the castle and reconnect the structure to the Victorian seaside village of Mumbles.

Visitor facilities have been provided within Alina's Chapel, which was never previously opened to the public and a modern glass bridge inserted at the chapel level, to represent a 2011 layer of history being added to the mediaeval structure.

During July 2011 to September 2011, 13,000 visitors were attracted to the castle whilst works were still ongoing. From October 2011 to May 2012, further works took place to stitch back together the ruinous structures rising from the limestone bedrock within the castle walls. 

During the works, various discoveries of mediaeval murals, inscriptions, coins and staircases within staircases have provided puzzles for conservationists and architects to resolve. 

In June 2012, a whole mediaeval labyrinth of vaults, chambers and rooms within the walls of the castle were revealed for people to discover.

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