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Barad-dûr was built by Sauron in the land of Mordor, not far ... - Facebook
: A "mountain of iron" with wall upon wall and battlement upon battlement. Barad-Dur - Mordor
: Its existence was bound to the One Ring ; the foundations were laid using the Ring's power, making them unshakable while the Ring remained. Role and Purpose Barad-dûr was built by Sauron in the land
Tolkien described the fortress as a massive, near-indestructible structure: Barad-Dur - Mordor
: Built with "adamant" and featuring iron crowns and steel gates.