Professor Albus Percival Wulfric Brian Dumbledore (Summer 1881 - June 1997) was the Head of Gryffindor House; Transfiguration Professor; Deputy Headmaster and later Headmaster of Hogwarts School of Witchcraft and Wizardry, Order of Merlin, First Class; Supreme Mugwump of the International Confederation of Wizards, Chief Warlock of the Wizengamot, and Grand Sorcerer. He was considered to be the most powerful wizard of his time. He was most famous for his defeat of Gellert Grindelwald, the discovery of the twelve uses of dragon's blood, and his work on alchemy with Nicolas Flamel.
