In J.R.R. Tolkien’s legendarium, Angband is the fortress where Morgoth rules.
Angband is Morgoth’s great stronghold in the First Age of Middle-earth. It lies in the north of Beleriand beneath the Iron Mountains and serves as the center of his power during the wars against the Elves and their allies.
Morgoth, originally named Melkor, is the first Dark Lord in Tolkien’s mythology. From Angband he commands Orcs, Balrogs, dragons, and other forces. The fortress is especially important in the stories of the Silmarils, the siege of Angband, and the ruinous wars of Beleriand.
Angband is distinct from Barad-dûr, which is Sauron’s fortress in Mordor during the Second and Third Ages. Dol Guldur is another Sauron-related stronghold, while Isengard is associated with Saruman. Keeping these fortresses separate helps place Tolkien’s stories in their correct historical ages.