The book "Princess Belgioso. Unpublished or rare aristocratic memories and secret state archives" by Raffaello Barbiera tells the story of an outstanding personality of the 19th century, known for her extraordinary beauty, intelligence and activity. In the book, the author reveals the most interesting facts from the life of Princess Belgioso, which previously remained out of the public's attention. Encounters with the politics, art, culture and intrigues of the reign of the era make this book a fascinating documentary that opens new horizons for understanding the life and activities of an outstanding personality.