Isengard

In J. R. R. Tolkien's fantasy writings, Isengard is a large fortress in Nan Curunír, the Wizard's Vale, in the western part of Middle-earth. In the fantasy world, the name of the fortress is described as a translation of Angrenost, a word in Tolkien's elvish language, Sindarin, a compound of two Old English words: īsen and ġeard, meaning "enclosure of iron".