The Diadem Museum is one of the most ravishing historical monuments in the Wizarding World, located in the Ravenclaw Building. Only offered access to Ravenclaw students, this museum is quite a sight to behold. At the entrance bestows the "Lost Diadem", which once belonged to Rowena Ravenclaw. Throughout the museum is a collection of works that Rowena herself discovered and wrote. In addition to some statues, portraits, some other belongings she had, there is also a reference section of books that would never be found anywhere else in the world. With some of the best knowledge a wizard or witch can have, any Ravenclaw who needs help with a question can be garaunteed to find the answer here... plus many other secrets Rowena has since kept hidden.