noun
Refers to a grand residence, especially of a noble or shogun; can also be used for luxurious modern homes in a figurative sense.
京都の二条城には、豪華な御殿が残っている。
At Nijo Castle in Kyoto, a magnificent palace remains.
彼は郊外にまるで御殿の
He built a house in the suburbs that is just like a palace.
宮殿 is a more general term for a palace, often used for Western-style palaces, while 御殿 specifically refers to a Japanese-style lord's residence or shogun's palace.
Compound of 御 (honorific prefix) and 殿 (hall, mansion). Originally referred to the residence of a high-ranking noble or shogun.