The Harry Potter series captured the imagination in a fantastical and compelling style never before seen. The seven Horcruxes are bench marks that lead you through the full story. Understand the Horcrux and why the seven were important.
What is a Horcrux anyway?
A Horcrux is a magical invention, a powerful object that houses a bit of the soul of a dark witch or wizard. The purpose of housing a portion of one's soul within a Horcrux is to reach the ultimate-true immortality, states a diary entry of J.K. Rollings noted on Harry Potter Lexicon.
How is a Horcrux created?
The laws of nature are violated by a disgusting act of dark magic. The creation of a Horcrux is an abomination. The Horcrux is evil, so evil no one will speak of it directly. A supreme act of evil is the only way to create a Horcrux-murder. Killing rips the soul apart and the damaged, torn portion is encased to create a Horcrux, according to the official Harry Potter Wiki.
The seven Horcruxes of Voldemort
While another wizard, Herpo the Foul, was able to create a Horcrux, Lord Voldemort (or he who shall not be named) created seven Horcruxes to house his soul. It was a novel idea at the time he thought of it, as a very young child. Harry and Dumbledore learned of the entirety of Voldemort's (then Riddle) questioning of Slughorn about Horcruxes by watching his memory of that moment magically. Dumbledore joins with Harry in destroying all the Horcruxes at that time, in chapter twenty-three of Harry Potter and the Half-Blood Prince.
What were the seven Horcruxes?
Voldemort created seven Horcruxes to protect him against death, even though it meant living in a state worse than death. One of the Horcruxes was the body of Voldemort himself. The rest of the Horcruxes were discovered and destroyed throughout the Harry Potter series of books, thus killing Voldemort completely.