Harry Potter's Hogwarts School of Witchcraft and Wizardry is one of the most famous and mysterious fictional schools in the world. Hogwarts Castle has a lot of magical and mystical places, and the Room of Requirement might be one of the most mysterious yet. The Room of Requirement plays an important role in the Harry Potter franchise, popping up at different times throughout the series to help Harry and the rest of the Hogwarts students. It even helped Dobby and Dumbledore as well, and it is where Voldemort hid one of his Horcruxes, making the Room of Requirement one of the most intriguing and probably most important rooms at Hogwarts.
Source：https://www.cbr.com/harry-potter-room-of-requirement-explained/
