The early "churches" were homes. Rome kept building cathedrals that were built according to the bishop's ego. Protestants treated the church building as not only a place for Sunday worship, but also as a school and a venue for townhall meetings. The American Religion now build them to accomodate gyms, bowling alleys, food courts, multi-media presentation halls and concert arenas, and other trappings of secular society.
The church building usually devolves into some anthropocentric object of worship.
In ages of weak Faith great works of art are denigrated and one builds a castle in his own mind.
The Incarnation continues to scandalise some.