Work is progressing well on Y Stordy, the new £2.6 million archive extension to the rear of Carmarthen library.
Contractors TRJ started work on the site in May this year and it is hoped that the building will be open by next Autumn.
The development of the new, much needed, purpose built archives facility will help ensure the awaited return of the Carmarthenshire Archives collection to the county.
Once complete, Y Stordy will contain the current archive collection, with room for up to around 25 years new material.
Alongside the construction of the extension there will also be external works, internal alterations to the library, external fabric upgrade of the Book Stack and some improvements to the frontage of the existing library.
The library, community centre and car park remain open as usual throughout the construction works.
Executive board member for culture, sport, tourism, Cllr Peter Hughes Griffiths, said: “It’s pleasing to see work is taking shape on this fantastic new building which will ensure that we keep Carmarthenshire’s historic documents in the county in a state-of-the-art, purpose-built building.”