"There was a large resident population at the site, a number of specialists not dedicated to food production, and political, religious, economic, and/or military relations with other sites within its area of influence." Unfortunately, few, if any, of the residential structures surrounding the large centers of the city have survived. The main part of the site is a complex of clay constructions stretched out for in a north-south direction, although the site is oriented 8° west of north. The urbanized zone may have covered an area as large of 2 km2. This particular site layout is the way the city was from 600 – 400 BCE, which is when the final Olmec occupation occurred. This site is particularly fascinating because of its layout—not only does Complex A face within 8 degrees of true North, but the east and west sides of the site are almost identical, showing bilateral symmetry. This is perhaps related to religion (it’s fairly speculative, at this point) but it certainly shows a high level of sophistication and city-planning.