Historical events of the room of requirement

1.1On the morning of the Christmas party in 994, Dumbledore took a wrong turn when he went to the toilet and entered this room, which contained various exquisite and luxurious urinals. (Harry Potter and the Goblet of Fire)

After Pauline got drunk, Dobby hid her in the room of requirement. (Harry Potter and the Order of the Phoenix)

3. Harry once used the room of requirement as the stronghold of D.A. organization and secretly conducted magic training. (Harry Potter and the Order of the Phoenix)

4. At Christmas, Dobby used his brains and hung a hundred golden balls from the ceiling of the room of requirement. Each golden ball had a big picture of Harry with a line engraved on it: "Hallelujah Christmas!" . (Harry Potter and the Order of the Phoenix)

5. On Christmas Day in the fifth grade, Harry kissed Zhang Qiu under the mistletoe in the room of requirement. (Harry Potter and the Order of the Phoenix)

6. Harry hid Snape's potions textbook here. (harry potter and the half-blood prince)

7. Malfoy used the room of requirement to secretly repair the disappearance cabinet connected with knockturn alley, and introduced the Death Eaters to Hogwarts. (harry potter and the half-blood prince)

8. sibyll trelawney, a divination professor, hid the sherry bottle in the room of requirement. Malfoy threw the bottle out the door the night Harry and Dumbledore went to get Voldemort's horcrux. (harry potter and the half-blood prince)

9. In the seventh grade, Neville completely offended Carol's brother and sister and hid in the room of requirement for a long time. (Harry Potter and the Deathly Hallows)

9. Before the last World War, members of D.A. and members of the Order of the Phoenix sent students who didn't take part in the war to the Pig's Head Bar through the portrait passage in the room of requirement (discovered by Neville). (Harry Potter and the Deathly Hallows)

10. In the Hogwarts War, the Weasleys and other decent people in the book entered the room of requirement through the passage of the pig's head column as the starting point of the battle. (Harry Potter and the Deathly Hallows)

12. The room of requirement is also the place where Voldemort hid the crown of Ravenclaw, one of the horcruxes when he was young. (Harry Potter and the Deathly Hallows)