The physical structures of the Houses of Worship provide a space for a growing number of people to gather to worship and to serve their community. It is important, therefore, that the space created be welcoming to all. Thus, the physical requirements, like the practice of worship inside the Houses of Worship, are simple: It must have nine sides with nine entrances, signaling its openness to all. Inside, there are no pulpits or altars, and no pictures, icons, or statues. Most importantly, it should be beautiful and as perfect as is possible in the world of being, so as to act as a means of nurturing an attraction to the sacred.