Severus Snape's portrait

Severus Snape's Portrait is an animated painting that hangs in the Headmasters office of Hogwarts School of Witchcraft and Wizardry. As Headmaster of the School, Severus Snape had the right to have his portrait hung in the office, however because of his connection to Lord Voldemort and the Death Eaters, many did not wish for it to hang there. Fortunately, Harry Potter was shown Snape's memories that proved he was in fact loyal to Albus Dumbeldore, and played a major part in the downfall of the Dark Lord. As such, his Portrait was hung along with the others of the other Headmasters by the time Harry Potter's children had gone to school.