The Seven Kingdoms (known as Westeros or the Sunset Kingdoms to many foreign peoples) is a feudal realm ruled from the Iron Throne in the Red Keep of King’s Landing. The name of the realm comes from the fact that it is made up of seven distinct former realms, each with their own history and some with their own distinct cultures and religions. Six of the seven realms were conquered by Aegon Targaryen (the Conqueror) and his sisters. These former realms were the Kingdom of the North, the Kingdom of Mountain and Vale, the Kingdom of the Iron Islands and the Trident, the Kingdom of the Rock, the Kingdom of the Reach, and Kingdom of the Stormlands.
The seventh realm, long claimed but only recently conquered, is the Kingdom of Dorne, which was ruled by its sovereign lord, a Prince of House Martell.