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17 Random "Harry Potter" Book Facts That I, For One, Find Unbelievably Fascinating

Did you know Harry gave his Triwizard Tournament money to Fred and George?

We asked the BuzzFeed Community to tell us the most interesting facts from the Harry Potter books. Naturally, we couldn't fit them all into one post, so here are some more amazing responses.

1. Sirius Black, Remus Lupin, James Potter, and Peter Pettigrew were actually the ones who created the Marauder's Map when they were students at Hogwarts.

George and Fred giving Harry The Marauder's Map in "Prisoner of Azkaban"

2. Albus and Aberforth Dumbledore had an intense sibling rivalry after their sister, Ariana, accidentally killed their mother. They competed over who cared the most about their sister. They dueled against each other, and when Ariana tried to stop them, Albus accidentally killed her.

Aberforth meeting Ron, Harry, and Hermione in "Deathly Hallows," talking about his sister, Ariana

3. Harry, Ron, Hermione, and the Weasley family visited Arthur at St. Mungo's Hospital after he was attacked in the Department of Mysteries. They noticed Neville in the same ward, visiting his parents who were very much alive but driven "insane" by Bellatrix's Cruciatus Curse.

Arthur Weasley being attacked in the Department of Mysteries; Neville's parents in a photograph of the original Order

4. When Voldemort died in Deathly Hallows, he didn't disintegrate into a million little pieces — he died a mortal human being.

Voldemort dying in "Deathly Hallows: Part 2"

5. The two-way mirror Harry used in Deathly Hallows was actually given to him by Sirius Black in Order of the Phoenix, just in case he needed to ask him for help.

Harry looking at the two-way mirror in "Deathly Hallows: Part 2" near Dobby's grave

6. Because Hermione always wanted to be the best in her class, her boggart in Prisoner of Azkaban was Professor McGonagall announcing she failed all of her tests/courses.

Hermione failing making a potion in potions class; Professor McGonagall staring at Ron and Harry quizzically

7. Not only did Professor Umbridge send the Dementors to torture Harry and Dudley in Little Whinging, but she also gave Fred, George, and Harry a lifetime ban from Quidditch.

Umbridge standing in front of The Great Hall as new Headmistress of Hogwarts

8. After working under Barty Crouch Sr., Percy returned to the Weasley family in Deathly Hallows and told a funny joke to Fred just before he died.

Percy standing with the Weasley family outside of Hogwarts

9. In Chamber of Secrets, Peeves (a mischievous poltergeist at Hogwarts) broke the vanishing cabinet to distract Filch from yelling at Harry. This ended up being the same cabinet Malfoy repaired in Half-Blood Prince in order to kill Dumbledore.

The book cover of "Chamber of Secrets" and the Vanishing Cabinet in "Half-Blood Prince"

10. Bellatrix Lestrange was actually Nymphadora Tonks's aunt. Nymphadora's mother, Andromeda, was Bellatrix's younger sister.

Tonks, Bellatrix, and the Black family tree

11. Harry's first official date was with Cho in Order of the Phoenix. They went to Hogsmeade and drank tea on Valentine's Day.

Cho and Harry kissing in "Order of the Phoenix"

12. Nearly Headless Nick hosted a Deathday Party for himself on Halloween in Chamber of Secrets to celebrate his 500th anniversary of death.

Nearly Headless Nick taking his head off in "Sorcerer's Stone"

13. The Bloody Baron (Slytherin's ghost) was deeply in love with Helena Ravenclaw (Ravenclaw's ghost). When she ran away to Albania to get away from her mother, Rowena Ravenclaw, the Bloody Baron asked her to return with him. When Helena refused, he killed her and then himself.

Helena Ravenclaw talking to Harry in "Deathly Hallows: Part 2;" the Bloody Baron flying over Slytherin's table in "Sorcerer's Stone"

14. Hogwarts students and professors held a funeral for Dumbledore when he died and gave him a proper farewell at the Black Lake.

Luna Lovegood and Madam Pomfrey raising their wands in the air in honor of Dumbledore's death

15. During the Battle of Hogwarts, Harry invisibly punched Malfoy in the face.

16. The way to enter the kitchens at Hogwarts was through a fruit portrait in the entrance hall. Once you tickled the pear in the portrait, the door would open.

Large portraits hanging in the Hogwarts staircase

17. And Harry gave the money he won from the Triwizard Tournament to Fred and George, and they used it to open up their joke shop: Weasleys' Wizard Wheezes.

Ron bargaining to buy a toy at Fred and George's joke shop

Note: Submissions have been edited for length and clarity.