noun
Refers to a building or hall used for worship, especially in Shinto contexts. Often a formal or architectural term.
神社の祭殿で結婚式を挙げた。
We held our wedding ceremony in the shrine's hall of worship.
神殿 is a more general term for a temple or sanctuary, often used for non-Japanese religious buildings, while 祭殿 specifically refers to a hall for rituals or worship within a Japanese shrine complex.
Compound of 祭 (sai, 'festival, worship') and 殿 (den, 'hall, palace'). The exact historical derivation is uncertain, but the kanji directly reflect the meaning of a hall for worship.