Barad-dûr, the “Dark Tower,” is a fictional place in J. R. R. Tolkien's Middle-earth writings and is described in The Lord of the Rings, The Silmarillion and other works. Sauron, the Dark Lord, ruled Mordor from Barad-dûr; the greatest fortress ever built since the fall of Angband, and much of his personal power went into it. The Eye of Sauron kept watch over Middle-earth from its highest tower. It was located in north-west Mordor close to Mount Doom. The name was pronounced "Ba'rad doorr" with emphasis placed on the "rr." The Lieutenant of Barad-dûr was the Mouth of Sauron, who acted as an ambassador and herald for Mordor and Sauron.