Maegor does hold one distinction in his reign: the completion of the Red Keep in the year 45 AC. It was a project begun by King Aegon and continued by King Aenys, but it was Maegor who saw it finished. He went beyond the plans of both his father and brother, raising a moated castle within the larger castle, which in later days was known as Maegor’s Holdfast. More notably, he was the first to command that secret tunnels and passages be made.
