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From A Wiki of Ice and Fire
and the location of Kingsgrave
Kingsgrave is the seat of House Manwoody in Dorne. It is located in the Red Mountains approximately halfway through the Prince's Pass, north of Skyreach and south of the tower of joy.
Kingsgrave takes its name from when the founder of House Manwoody slew a king of the Reach in the distant past.
References and Notes