After many complaints from worried parents and the wizarding community, the Ministry of Magic finally decided to close Hogwarts School of Witchcraft and Wizardry permanently. The decision came after a string of fatal accidents, including a student falling off his broom in a quidditch tournament, a student being crushed by the whomping willow (An enchanted and dangerous tree which sits on the grounds of the castle), and death at the hands of a dragon for an ill-fated student foolhardy enough to enter the tri-wizard tournament held every five years on Hogwarts grounds.