About:
Salazar Slytherin (fl. c. 993) was a pure-blood wizard, noted for his cunning and determination. He was regarded as one of the greatest wizards of the age, respectively as a Parselmouth and as a skilled Legilimens. Slytherin was one of the four founders of Hogwarts School of Witchcraft and Wizardry along with Godric Gryffindor, Helga Hufflepuff and Rowena Ravenclaw, as well as the namesake of the Slytherin House.
He distrusted and was, in fact, quite disdainful of Muggle-bornstudents to the point of proposing that they should not be accepted at Hogwarts. However, when he expressed his opinion to the other Hogwarts founders, they did not agree with him. In response, he left the school, never to return. Slytherin died sometime near the eleventh century, after creating the Chamber of Secrets, concealing a basilisk, ready to have the Chamber reopened to purge the school of those who, in Slytherin's view, were unworthy to study magic: Muggle-borns.