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Hidden Details You Missed In The Room Of Requirement In Harry Potter

If Harry Potter fans had the chance to visit only one room in Hogwarts, the Room of Requirement would probably be high on their wish lists.

Also known as the Come and Go Room, as Hermione (Emma Watson) informs everyone, the room made its first appearance on screen in The Order of the Phoenix. It was unwittingly discovered by Neville (Matthew Lewis) when he needed a place for Dumbledore's Army to brush up on their Defense Against the Dark Arts skills. As Hermione explains, "The Room of Requirement only appears when a person has real need of it, and is always equipped for the seeker's needs."

The Room plays a major part later in the story. In The Half-Blood Prince, Harry (Daniel Radcliffe) hides the potentially dangerous potion book in the room, and he and Ginny (Bonnie Wright) also kiss there for the first time. Draco (Tom Felton) uses it to smuggle in Death Eaters via the Vanishing Cabinet, and in the Deathly Hallows: Part 2, it's used as a shelter and secret passage by the DA before becoming the site of a hunt for a Horcrux and a fiery showdown.

Fans aren't the only ones who love this room. In a behind-the-scenes feature about the final movie, Felton said, "Obviously we've seen some pretty amazing sets, but for attention to detail and just grandness, the Room of Requirement ... was incredible." Director David Yates described it as "a really fun space, it's a real achievement." The set designers not only made the Room the perfect spot for an action sequence, they threw in some Easter eggs for fans, too. Here are the hidden details you missed in the Room of Requirement in Harry Potter.

The set designers turned the Room of Requirement into a shelter for the DA

The first time we see the Room of Requirement in The Deathly Hallows: Part 2 comes when it's being used by the DA as a shelter from the Death Eaters, who have taken over Hogwarts.

Stuart Craig was the production designer on all of the Harry Potter movies, and more recently worked on the Fantastic Beasts series. Speaking about the Room of Requirement shelter set, he told Entertainment Weekly that he was inspired by bomb shelters, which can still be found in London, "as it's this temporary respite while a lot of bad things are going on outside."

Harry, Ron (Rupert Grint) and Hermione's visit to the DA's shelter is pretty dramatic, so you could be forgiven for not noticing too many details about the set on screen, yet another reason why this should be one the most paused moments in Harry Potter movies. Accounts from people who were lucky enough to see it in person tell us what to look out for.

In 2011, a writer for fan blog The Leaky Cauldron who got to visit many of the sets wrote that the Room of Requirement was their favorite. "This set goes beyond just being cluttered or lived in; it breathes resistance movement shelter," they added. Look out for, "inkwells, blankets, pillows, dirty clothes, towels, cups, old issues of The Quibbler, shaving kits ... strewn strategically around the set."

A writer for Collider who also visited noted that the books in the Room even had appropriately magical titles: Winogrand's Wonderous Water Plants and Gawshawks Guide to Herbology, likely a tribute to DA leader Neville's green thumb. Even the sleeping bags had Hogwarts insignia on them.

Look for recognizable props in the Room of Requirement

The nature of the Room of Requirement meant it went through multiple looks in the course of the films depending on what it was needed for at the time. The version the filmmakers are most proud of was the Room of Hidden Things, which Harry accesses to hide the potions book in Half-Blood Prince, and again when searching for Rowena Ravenclaw's diadem in Deathly Hallows: Part 2.

Craig told Vanity Fair that the production team started that final set by building a small model with Styrofoam, which they recreated with dolls' house furniture before finally making the human-sized version. In a behind-the-scenes feature, art director Alastair Bullock explained the core was made of scaffolding covered with black plywood, with thousands of props layered on top.

The team had plenty of props to use — 72 containers' worth, set decorator Stephenie McMillan told the behind-the-scenes feature. In addition to chairs, cauldrons, and books are props that only die-hard Harry Potter fans understand. There are chess pieces from Sorcerer's Stone, teacups used in Professor Trelawney's (Emma Thompson) class, and paper lanterns from Professor Slughorn's (Jim Broadbent) Christmas party. The Room also houses the one-eyed witch statue that Harry and Ron walk past in Sorcerer's Stone. Although it was left out of the Harry Potter movies, it marked the entrance to the secret passage to Hogsmeade, which had been closed off by this point.

The Half-Blood Prince version of the Room also included nods to its predecessors. Look out for the harp used to soothe three-headed Fluffy in Sorcerer's Stone, the projector used by Snape (Alan Rickman) and Umbridge (Imelda Staunton), and the knight chess piece Ron rode in Sorcerer's Stone. Because when you work on Harry Potter, attention to detail is a requirement.