The Palace of Galen was where the royal family of Galen lived.
It was the place the Princess Krisztina stayed when she was waiting to be married to Viktor, the Prince of Melendia. It was subjected to a terrorist attack organised secretly by Suskind, nearly killing the Princess and Justice Rossiter.
Evelyn commented on the spectacular nature of it and its beauty. It had many, many rampants, towers, and was about 100 stories high by Evelyn's assessment.