Hogwarts occurring is a passage to the Hog's Head bar that formed before the Battle of Hogwarts. Due to the nature of the Room of Requirement, it is possible that several passages to different locations could be accessed from the Room. The three passages out of Hogwarts that Filch does "not" know about are: A further link between two vanishing cabinets, one in the school and the other in Borgin and Burkes in Knockturn Alley presumably worked until "Chamber of Secrets" when Peeves (persuaded by Nearly Headless Nick) smashed the Hogwarts cabinet. The passage was reopened in "Half-Blood Prince" when Draco
Hogwarts from the Ministry of Magic. Students who achieve a high enough O.W.L. grade in a particular subject may take its advanced course for the final two years, in preparation for the Nastily Exhausting Wizarding Tests (N.E.W.T.) given at the end of the seventh year. The day begins at Hogwarts with breakfast in the Great Hall. Students sit at their own House table and can eat and socialise, or finish homework. The Headmaster or Headmistress eats with the professors at the High Table placed at the far end of the hall. During breakfast, owls bring in the students' post, generally consisting