The Tragedy at Summerhall is a event mentioned in A World of Ice and Fire, happened approximately forty years before the events of A Song of Ice and Fire saga. It was a fire at Summerhall, a pleasure castle of House Targaryen in the Dornish Marches, in 259 AC. The conflagration caused the deaths of, among others, King Aegon V Targaryen, his eldest son, Prince Duncan Targaryen, and Ser Duncan the Tall, the Lord Commander of the Kingsguard.