"The Conqueror Worm" is a poem by Edgar Allan Poe about human mortality and the inevitability of death. It was first published separately in Graham's Magazine in 1843, but quickly became associated with Poe's short story "Ligeia" after Poe added the poem to a revised publication of the story in 1845. In the revised story, the poem is composed by the eponymous Ligeia, and taught to the narrator in the fits of her death throes. Source: Wikipedia (en)