Where is The Red Keep?
Located in the heart of the capital, King's Landing, the Red Keep is the castle and seat of the Westerosi monarchy. It was constructed after Aegon I Targaryen's conquest of Westeros, and it has been the official residence of the monarchy ever since.
The Red Keep's Significance
Throughout its existence, it has been the seat of the Targaryen dynasty, Robert Baratheon and his heirs, and, briefly, two queens: Cersei Lannister and Daenerys Targaryen. In the timeline of "Game of Thrones," the Red Keep is severely damaged following the Battle of King's Landing. Enough of it is intact, however, to remain as the seat of the newly elected monarchy, with Bran Stark as the first elected king to rule from it.