Complex sentence: The sanctuary is located at the center of the building and the altar is at the center of the sanctuary with rows of pews radiating out from the center, reflecting the idea that worship should be a central aspect of the life of the congregation.
Split into simpler sentences: The sanctuary is located at the center of the building, with the altar located in the center of the sanctuary. Rows of pews surround the alter in a circle pattern, reflecting the idea that worship should be a "central" aspect of the life of the congregation.