The picture Tenby by Mark Raggett was recently donated to the museum by Rosemary and Janet Williams in memory of their father, Neville Williams.
Born in 1926, Neville was brought up in Greenhill Avenue and educated at Greenhill School where he was taught chemistry by his father.
Not scientifically minded, Neville read history at Aberystwyth University before doing his National Service in the Royal Air Force.
After leaving the RAF, he taught for a while before returning to the Air Force as chief education officer with the rank of squadron leader. He went on to work in adult education.
Neville was a well-known figure in Tenby and always retained a close affection for his birthplace.
He frequently revisited the town throughout his life. He kept up with the local news by having the Tenby Observer sent to him. Neville Williams died in 2012.
The picture is a mixed media work showing the harbour of Tenby. Mark Raggett's exhibition runs in the museum until November 11. After this time, the painting will be on show in the museum's Wilfred Harrison Art Gallery. The museum is grateful for this very generous donation.