In A Song of Ice and Fire a principal focus of the action is the Red Keep, the castle-fortress towering over the city of King's Landing, the capital of Westeros. A great deal of the political machinations of the series take place there. For the HBO series Game of Thrones, the producers faced the challenge of realising the pivotal location on-screen in a convincing manner. The Red Keep of King's Landing, overlooking Blackwater Bay with the Great Sept of Baelor visible in the mists to the…