She Walks in Beauty

"She Walks in Beauty" was one of the works of Lord Byron. When the Thirteenth Doctor met the author while visiting Villa Diodati in 1816, she quoted "She walks in beauty, like the night. Of cloudless climes and starry skies."; prompting Byron to say that he was flattered that he was familiar with his works. (TV: The Haunting of Villa Diodati)

Behind the scenes
The Thirteenth Doctor quotes the opening lines of Lord Byron's poem "She Walks in Beauty" in the episode The Haunting of Villa Diodati. However, the poem is not explicitly referred to by name in the episode.