Denethor is a fictional character from J.R.R. Tolkien's Middle-earth legendarium, specifically featured in "The Lord of the Rings." He serves as the last ruling Steward of Gondor, a kingdom in the struggle against the dark lord Sauron. Denethor is known for his intelligence and leadership but is ultimately consumed by despair and pride. As the story unfolds, Denethor becomes increasingly paranoid and distrustful, particularly of his son Faramir. His obsession with the palantír, a seeing-stone, leads him to make tragic decisions, including his eventual downfall. Denethor's character illustrates the themes of power, despair, and the consequences of isolation.