The major architecture can be divided into five groups, labelled A to E. Each of these groups has at least one pyramid and various palace type structures. The major residential complexes of the site are found in Groups A, B and D, not including the royal palace in Group C. The major architectural groups are divided by lower lying areas that may have been used for intensive agriculture. The urban area of the site extends for around the site core, with this area having been continuously occupied with a full range of structures from elite down to commoner in status.