Most of the Palaces within the Kyoto Imperial Garden were moved to Nijo-jo Castle where Imperial family's villa was in those days, Nijo-jo Castle was used as a symbol of the Tokugawa family castle being changed to the castle of the Imperial family.
京都御苑内にあった御殿は、そのほとんどが、当時、皇室の離宮であった二条城に移築され、二条城が徳川家の城から皇室の城へと変ったことの、シンボルとして利用された。