Shishin-den Hall (hall for state ceremonies), (Seiden (main palace)) of the highest social status which has handed down the style of the Heian period, and Tsune-goten (private palace), which was the place for daily life, have been maintained.
平安時代の様式を伝える最高格式の紫宸殿（正殿）や日常生活の場である常御殿などが保存されている。