had been at the home on the outskirts of Llanfairpwll for just over a week after spending two weeks as a patient at Ysbyty Gwynedd, Bangor. He had been suffering from prostate cancer and from lung cancer, believed to be a result of working with lead-based paints. Williams was buried at St Mary's Church, Llanfair-yng-Nghornwy. Paying tribute to Williams after his death, bass-baritone singer and Williams collector Bryn Terfel said, "I'm deeply saddened by the passing of Wales's foremost ambassador in the visual arts. Long may his memory live on in the legacy of his numerous, wonderful paintings." In 1949 Williams had his first one-man-show at a private gallery in London. His first Patagonia exhibition took place in 1971. Later in 2006, the Welsh singer and Manic Street Preachers frontman James Dean Bradfield included a track called "Which Way to Kyffin", dedicated to Williams, on his album The Great Western. As an artist His works typically drew inspiration from the Welsh landscape and farmlands. His works may be seen in a permanent exhibition in the Oriel Kyffin Williams Gallery which opened in 2008 at Oriel Ynys Môn in Llangefni, Anglesey, as well as at many other galleries elsewhere in Britain. He was president of the Royal Cambrian Academy and was appointed a member of the Royal Academy in 1974. In 1995 Williams received the Glyndŵr Award for an Outstanding Contribution to the Arts in Wales during the Machynlleth Festival. He was awarded the OBE for his services to the arts in 1982 and was knighted in 1999. The Kyffin Williams Drawing Prize was established in 2009. The winning works from the 2018 prize are due to be exhibited at the Oriel Kyffin Williams Gallery. In February 2011 it was announced that Williams' paintings of Patagonia would be shown for the first time. His last passport, on show in the Oriel Ynys Môn gallery at Llangefni, 2004–2014, has the name Sir John Williams. Kyffin was his grandmother's maiden name. Williams was a great raconteur and also a fine writer, publishing his autobiography in "Across the Straits" and "A wider sky". The National Library of Wales was one of the first national institutions to purchase one of his works in the late forties and continue to support his work throughout his life. In acknowledgement of his gratitude for their support he bequeath them his papers and a significant body of his works