"The History of Magic" Chapter 2

Rowena Ravenclaw's Diadem also known as The Lost Diadem, is an heirloom which belonged to Rowena Ravenclaw, the celebrated Hogwarts Founder of Ravenclaw House. The Diadem was not too unlike the shimmering tiara of Muriel Weasley, and etched upon its surface was Ravenclaw's famous quotation: "Wit beyond measure is a man's greatest treasure." It was said to enhance the wisdom of its wearer, which is Ravenclaw's most treasured attribute.

Helena Ravenclaw, Rowena's daughter was jealous of Rowena's attention. She stole her mothers diadem hoping it would get her luck and hope and wiser, and so fled to Albania. Meanwhile, Rowena had sent the bloody baron to find Helena. As the Bloody Baron was seen, Helena shoved the diadem into a treetrunk. When she refused the Bloody Baron's advaces, he stabbed her, fatally wounded her by accident. Horrified at himself, he brought the dagger towards his heart and....