In Shinto shrine architecture, the haiden (拝殿) is the hall of worship or oratory.
It is generally placed in front of the shrine's main sanctuary (honden) and often built on a larger scale than the latter.
The haiden is often connected to the honden by a heiden, or hall of offerings.
[1][2] In some cases, for example at Nara's Ōmiwa Shrine, the honden can be missing and be replaced by a patch of sacred ground.
[2] In that case, the haiden is the most important building of the complex.