Anyone who hasn't been living under a rock knows who Lord Voldemort is — known by a plethora of names aside from his chosen one such as He Who Must Not Be Named, You-Know-Who, the Dark Lord and even his birth name, Tom Riddle. He's the main antagonist of the Harry Potter series and for quite a solid chunk of the books, he remains a mystery. He has a serpentine face with a flat nose and red eyes (though not in the movies) and is described as being something that's not quite human — but how? How can a wizard not be human?
The answer is revealed in book six, when Dumbledore tells Harry that Voldemort has been splitting his soul and encasing parts of it in hidden objects to secure his immortality. These are known as Horcruxes.
Voldemort's vanity proves to be his downfall, since each of the objects are something special and therefore easier to track down (seriously should have made his Horcruxes a grain of sand each or something). So why did he choose these specific ones?
7 The Diary
The first Horcrux made by Lord Voldemort came into existence when he was only sixteen. Still at school, he transformed a diary into one. Before he was defeated, he passed the diary on to a man that he considered to be a faithful follower, Lucius Malfoy. It then found its way into the hands of Ginny Weasley, through the doors of Hogwarts, and Tom Riddle began to seep through its pages in an attempt to come back while the real Voldemort was off hiding.
Although we were introduced to this object in the second book, we had no idea what it truly was. Harry managed to destroy it by impulsively stabbing it with a basilisk fang — and basilisk venom just so happens to be on of the very few substances that is corrosive to a Horcrux.
Talk about getting lucky but then again, that's the story of Harry's life.
6 The Ring
Marvolo Gaunt's ring was an heirloom from the Gaunt family. Merope was Tom Riddle's mother and although the Gaunt family were ostracized, they were about as pure-blood as it got before their line died out — in fact, they were descended from Salazar Slytherin himself. Since Merope had Voldemort with a Muggle, he himself was not a pure-blood, but his family were and no doubt he valued this enough to consider the ring worthy of being a Horcrux.
He wore the ring while he was at Hogwarts, but it wasn't actually made to hold a piece of his soul until later. It was destroyed by Albus Dumbledore close to the end of the book series with Godric Gryffindor's sword — a sword, thanks to Harry, impregnated with basilisk venom.
5 The Locket
Voldemort, as a child, was very lonely. Born as a product of Amortentia, left to grow up in an orphanage, he had a bad start in life that made him into who he was. The first place he finally felt was home, much like Harry, was Hogwarts. With the castle being so important to him, he decided that each of his Horcruxes should be something from each of the founders.
Tom Riddle murdered a wealthy woman to get this and forced her house-elf into a confession. It was hidden in a seaside cave where he tortured two fellow orphans as a child, though it was later retrieved by Regulus Black after he defected from the Death Eaters.
No doubt this was his most important Horcrux thus far, since it once belonged to his favorite founder.
4 The Cup
That wasn't the only thing he stole from Hepzibah Smith.
She claimed to be a descendent of Helga Hufflepuff, and had a cup once owned by her. Helga Hufflepuff wasn't a founder that Voldemort particularly related to, but she was a founder nonetheless, so he also took the cup and transformed it into a Horcrux. It was later hidden in the vault of the Lestrange family — after all, Bellatrix was his most loyal follower and utterly infatuated with him, so she was probably happy to keep it hidden even though he wouldn't tell her what it was.
It was destroyed by Hermione during the Battle of Hogwarts using a basilisk fang.
3 The Diadem
Rowena Ravenclaw's diadem was said to make the wearer wiser. Jealous of her mother's power, it was stolen by her daughter Helena, who eventually hid it in the forests of Albania. The ghost of Helena was charmed by Tom Riddle and she told him where to find the diadem, allowing him to travel to Albania and find the object. It became the last of the founder Horcruxes, since he never got his hands on anything that belonged to Godric Gryffindor.
It was destroyed by Fiendfyre, another substance capable of destroying Horcruxes, when the Room of Requirement caught fire at the Battle of Hogwarts.
2 The Snake
For the whole of the book series, we didn't know very much about Nagini. She was a snake that seemed deeply bonded with Voldemort and could communicate with him, thanks to him being a Parselmouth. Eventually, it was revealed that she was a Horcrux, and she was killed by Neville Longbottom when he swung Gryffindor's sword down on her.
Of course, more was revealed about her in the Fantastic Beasts movies, creating a whole, human backstory that some fans loved and some fans criticized heavily for the sensitive issues present in the story.
1 Harry Potter
Harry Potter was the accidental Horcrux that Voldemort never intended to make. When his murder attempt failed, a part of his already broken soul took refuge inside of Harry, causing a connection between them that Harry desperately didn't want. When Harry found out about the part of Voldemort's soul living inside him, he was very willing to die to get rid of it — leaving Voldemort mortal and hoping someone else might finish the job.
Fortunately, Harry was able to do this himself.
The road to getting rid of the Horcruxes was a long one, and still, not much is known about their creation process. Only that it requires murder and possibly things even darker...
What objects would you use for your Horcruxes?