Through the ages, various supernatural entities — including fairies and witches — came to be associated with Halloween, and more than a century ago in Ireland, the event was said to be a time when spirits of the dead could return to their old haunting grounds. Dressing up as ghosts or witches became fashionable, though as the holiday became more widespread and more commercialized (and with the arrival of mass-manufactured costumes), the selection of disguises for kids and adults greatly expanded beyond monsters to include everything from superheroes to princesses to politicians.