With a remarkable career spanning more than six decades, Edinburgh-born Mr Williamson is an extraordinary singer and multi-instrumentalist whose work reaches far beyond the boundaries of traditional folk music.
His performances draw together original and traditional songs, Celtic music, poetry, mythology and stories gathered across a lifetime of travelling, writing and performing.
The concert will also mark a return to a landscape with which Mr Williamson has a strong personal connection.
In the late 1960s, he lived near Brynberian, within sight of the ancient burial chamber at Pentre Ifan and beneath the Preseli Hills.
His appearance at Canolfan Bethlehem therefore carries a particular local resonance, bringing him back to an area that played a memorable part in his life and creative journey.
Audiences at Canolfan Bethlehem can expect an intimate solo evening in the company of a true musical storyteller.
Accompanying himself on guitar, Mr Williamson moves effortlessly between songs, instrumental passages, poetry and tales, creating a performance shaped as much by the atmosphere in the room as by any prepared programme.
His concerts can be humorous and playful one moment, quietly reflective the next, with songs and stories unfolding naturally into one another.
It is this sense of spontaneity and connection that has made Mr Williamson such a compelling live performer throughout his long career.
As a writer and recording artist, Mr Williamson has explored an exceptional range of musical and literary traditions.
Alongside his own songs and poetry, his work has engaged with the writing of figures including William Blake, Dylan Thomas and Walt Whitman.
His repertoire has also drawn inspiration from Celtic, English, Indian and American musical roots, brought together by an artist whose creative curiosity has never been confined to a single genre.
Robin Williamson: Songs, Stories and Tunes takes place at Canolfan Bethlehem, Upper West Street, Newport, Pembrokeshire SA42 0TH, on Saturday, September 26 (7pm). Tickets cost £15 and advance booking is recommended.
https://www.zeffy.com/en-GB/ticketing/robin-williamson-songs-stories-and-tunes