The architectural styles of Shinto shrines had largely developed by the Heian period. The inner sanctuary in which the "kami" is believed to live is known as a "honden". Inside the honden may be stored material regarded as belonging to the kami; known as "shinpo", this can include artworks, clothing, weapons, musical instruments, bells, and mirrors. Typically, worshippers carry out their acts outside of the "honden". Near the honden can sometimes be found a subsidiary shrine, the "bekkū", to another kami; the kami inhabiting this shrine is not necessarily perceived as being inferior to that in the honden. At some places, halls of worship have been erected, termed "haiden". On a lower level can be found the hall of offerings, known as a "heiden". Together, the building housing the honden, haiden, and heiden is called a "hongū". In some shrines, there is a separate building in which to conduct additional ceremonies, such as weddings, known as a "gishikiden", or a specific building in which the "kagura" dance is performed, known as the "kagura-den". Collectively, the central buildings of a shrine are known as the "shaden", while its precincts are known as the "keidaichi" or "shin'en". This precinct is surrounded by the "tamagaki" fence, with entry via a "shinmon" gate, which can be closed at night.