Gregminster Palace towers over the city of Gregminster. As the palace of the emperor of the Scarlet Moon Empire, it existed as a symbol of Imperial authority.
Outside the palace itself is a barn while inside is a selection of offices, including that of the Imperial Guard. The Imperial throne room lies on the first floor.
Located on top of the palace is the Floating Garden which contains many rare plants. Here was where the final battle of the Gate Rune War took place. Following the defeat of Barbarosa Rugner the palace began to shake, forcing a rushed evacuation by the Toran Liberation Army officers within but the palace apparently remained intact.