Dumbledore came into possession of the Cloak of Invisibility after asking James Potter if he could examine its magic. Dumbledore was very interested in the Deathly Hallows, and he suspected James Potter's Invisibility Cloak might be one of these artifacts, which he confirmed while the Cloak was in his possession.
Why did James Potter give Dumbledore the Invisibility Cloak?
Dumbledore, who had searched for the Deathly Hallows in youth, asked to borrow the Cloak from James to study it. After James was killed, the Cloak was left in Dumbledore's possession.
Albus Dumbledore had James's cloak at the time of the latter's death, having wished to inspect it further. He kept the cloak in his possession until Harry began school at Hogwarts in 1991. Used his father's cloak many times throughout his years at Hogwarts.
Did Snape know Harry was under the Invisibility Cloak?
Dumbledore was doing James a favour by helping him pass down the Invisibility Cloak to his son Harry. Snape definitely knew because in book 4 when Harry sees crouch in Snapes office, he's in his invisibility cloak. As soon as snape sees the golden egg and the map he says 'potters here' to mad eye. Potters here.
However, there were a select few that had his trust, and whom he treated with respect. This included Bellatrix Lestrange and Severus Snape. No matter what Snape did as a spy, Voldemort never figured out he was not on the Dark Lord's side.
How James Potter Got the Invisibility Cloak - Harry Potter Explained
How were the Potters so rich?
The Potters' generational wealth is traced back to their ancestor, Linfred of Stinchcombe, who amassed a great fortune through his medicinal services and inventions of healing potions.
How did Draco know Harry was under the Invisibility Cloak?
From his confrontation with Harry in PofA near the Shrieking Shack. Malfoy saw Harry's head during the fight and most likely deduced he was under an invisibility cloak that slipped and showed his head.
How did Harry Potter's dad get the Invisibility Cloak?
James inherited the Cloak from his father, Fleamont Potter, who inherited it as a descendant of Iolanthe Peverell — a granddaughter of Ignotus Peverell. The Cloak passed down through generations of the family until it reached James and then Harry.
Dumbledore knew about Horcruxes. He knew how they were formed, what happened after that, etc. He probably got to know Harry was a Horcrux when he saw the Scar on Harry's forehead, but maybe he wasn't sure.
While in school together, Sirius once tricked Snape into almost entering the Shrieking Shack while Lupin was there, transformed into a werewolf. James realised the danger and stopped Snape, saving his life; this is the incident Dumbledore referred to at the end of the first book.
In The Lord of the Rings, Frodo, and the other members of the Fellowship of the Ring, were given cloaks by the Elves, and Samwise asked, "Are these magic cloaks?" The cloak given to Frodo camouflaged him so that the enemy could see "nothing more than a boulder where the Hobbits were."
He didn't need a cloak to be invisible, and he had no loved ones he would want to bring back from the dead. So, Voldemort never bothered himself with the Hallows and would have taken little interest in learning that the ring he had turned into a Horcrux was an object capable of bringing back the dead.
Harry did possess each of the Hallows eventually, for a brief moment of time. Without realising it, Harry Potter possessed one of the Hallows from the age of 11, the Cloak of Invisibility. The Cloak was rightfully his, and should have been passed down to him from his father, James Potter, had he not been murdered.
In the Harry Potter and the Deathly Hallows movie, Snape showed how much he loved Harry, providing him with his memories and showing that he saw Lily in him, his last words echoing this: "You have your mother's eyes."
In fact, James outright tells Lily that he's bullying Severus Snape because of the “fact that he exists, if you know what I mean”. James Potter saved Severus Snape from the werewolf prank before the Snape's Worst Memory scene happened. The mastermind of said prank is Sirius Black, James' best friend.
It is known that Harry is a descendant of Ignotus Peverell (The brother that received the Invisibility Cloak), and Voldemort is descended from Cadmus Peverell (The brother that received the Resurrection Stone).
Lord Voldemort was unaware that this Horcrux had been destroyed, until he forced the truth out of Lucius Malfoy (who did not know the diary was a Horcrux) shortly after his return to power in June of 1995, due to the portion of the soul being separated from his body for such a long time.
'Is Draco alive? Is he in the castle? ' The whisper was barely audible; her lips were an inch from his ear, her head bent so low that her long hair shielded his face from the onlookers.
This idea was incredibly embarrassing to him since Ron vehemently did not want to be cared for by his rich and famous best friend. This is precisely why Harry never tried to give the Weasleys money or give Ron lavish gifts - they didn't want pity.
It was confirmed on Pottermore that Hermione was also a bit of a Hatstall, as the Sorting Hat saw the potential for her to be both Ravenclaw and Gryffindor. In the end, Gryffindor won out, and it's possible that Hermione wanted to be seen for being brave more than for her intelligence.
At the beginning of the first book, Gringotts Vault 713, a higher-security vault, held a small grubby bag, which we later learn contains the Philosopher's Stone. Albus Dumbledore sends Hagrid to retrieve it while he escorts Harry to Diagon Alley.
