In J.R.R. Tolkien’s The Lord of the Rings, Denethor II rules the city of Minas Tirith.
Minas Tirith is the capital city of Gondor and the chief stronghold of the kingdom during the War of the Ring. It is built on the lower slopes of Mount Mindolluin and consists of seven levels surrounded by defensive walls. The city was originally called Minas Anor, meaning “Tower of the Sun,” before its name changed after the fall of Minas Ithil.
Denethor II is the Steward of Gondor, not its crowned king. He governs from the White Tower while the line of kings is absent. The city becomes the main target of Sauron’s assault in the Battle of the Pelennor Fields, where its defenders receive help from Rohan and Aragorn’s forces.
Minas Tirith is often confused with Minas Morgul, formerly Minas Ithil. Minas Morgul is the corrupted city held by Sauron’s servants, while Minas Tirith remains Gondor’s white-walled capital.