Visit the Gallery and Workshop

Mari Thomas Jewellery Gallery and Workshop has been based in Llandeilo, South Wales for nearly 11 years. It is a long way from the little workshop at the bottom of her parents garden where she set up 26 years ago but Llandeilo has well and truly become her home since she purchased the gorgeous three-storey Georgian building that was the Old Castle Hotel. It has transitioned beautifully into its current destination venue.

The Building - The Castle Hotel

A gorgeous grade 2 listed building in the heart of Llandeilo, W. Wales

The Old Castle Hotel

Now home to our jewellery gallery and workshop


Bespoke lighting in the entrance hall designed and created by Mari Thomas and Claire Staveley

Jewellery workshop

One of our in-house jewellery workshops - see where the magic is created

Mari Thomas Gallery

The Main Gallery

The Main Gallery

Browse and relax with a cup of coffee.

MT Gallery Artists Gallery

Selected from the very best national and international jewellers and designers

Meeting Room

Want to commission something special? Just get in touch to book a free consultation


Our Hours

Monday - Saturday:

10am - 5pm

Closed Sundays

Mari Thomas Jewellery, The Old Castle Hotel, 113 Rhosmaen Street, Llandeilo Carmarthenshire. S. Wales. UK SA19 6EN

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Front of gallery the castle hotel llandeilo

Made in Wales. UK

We are situated in the beautiful old market town of Llandeilo West Wales. “Cosy, beautiful and untouched”, Llandeilo has been chosen by the Sunday Times as the top place to live in Wales and represents the best of the UK. 

Llandeilo a “country chic” town is heralded for its charm and individual independent boutique shops and bustling town festivals that bring people together, promoting community harmony through entertainment and joy. The highlights are the Literature, Jazz, Music, and Christmas Festival of Senses. 

An interest free loan to purchase from us...

Collectorplan is an interest-free* loan to help you buy contemporary art and crafts in Wales. Backed by the Arts council of Wales loans are available from £50 to £5,000 to people who wish to buy a single piece of art or multiple artworks from us. 10% deposit is required once loan is approved. This is only available through the gallery and not online. Please contact us for more details