Rowena Ravenclaw is a character in the books about Harry Potter written by J. K. Rowling. In the books Rowena Ravenclaw was a witch in the 10th century who was one of the four people who started Hogwarts School of Witchcraft and Wizardry, a school in a castle in Scotland. She also started Ravenclaw House, which is one of the four groups of students called "Houses" at Hogwarts. Each student in the school is in one of the four Houses and each House has its own dormitory, an area of Hogwarts Castle where students in that House live. The Ravenclaw dormitory is in one of the towers of the castle.