The Marsh Library, located beside St. Patrick’s Cathedral in Dublin, Ireland, is the oldest public library in the country, having been established in 1701. It is a well-preserved time capsule, offering a glimpse into the prestige and scholarliness of the 18th century. But according to local folklore, it’s not just books that the Marsh Library houses. It has long been believed that the Marsh Library is haunted. The ghost in question? Well, the apparition is said to be none other than Archbishop Narcissus Marsh, the founder of the library. Marsh’s lingering spirit is said to haunt the library in search of an answer to a cryptic note his young niece left him, which he found only after she had eloped. However, she was never seen again and the mystery of her disappearance lies within a book in Marsh’s library. It is believed that Marsh’s spirit still roams the library after dark, trying to unravel the mystery of his niece’s disappearance. Another haunting entity is believed to be a former reader who was locked in the library overnight and stayed there forever, leaving only his spectral presence behind. An interesting fact about Marsh Library is the existence of ‘cages’, where readers were locked in to prevent them from stealing rare books. It is said that anyone who dares enter these cages might just meet a ghostly reader, keen to discuss the book he never could finish. While Marsh Library is a beautiful and educational place to visit in the daytime, locals and tourists alike may think twice about being locked in there overnight!