Bryntysilio Hall is a country house in Llantysilio, Denbighshire, north Wales, two miles west of Llangollen. It was the summer residence of Sir Theodore Martin, the author of Life of The Prince Consort, the official biography of Prince Albert, and of his wife, Shakespearean actress Lady Martin. Sir Theodore wrote most of the book whilst at Bryntysilio, which was their summer residence. He was knighted for his work and became a close friend of Queen Victoria. It was written 1874-1880. On 26 August 1889, during Victoria's visit to North Wales, she visited Bryntysilio Hall and took tea there. Sir Theodore showed the queen the writing desk where most of the work was written.