section_path: Architecture/Regional architectural styles/Usumacinta
section_name: Usumacinta
paragraph_text: Usumacinta
  
  The Usumacinta style developed in the hilly terrain of the Usumacinta drainage. Cities took advantage of the hillsides to support their major architecture, as at Palenque and Yaxchilan. Sites modified corbel vaulting to allow thinner walls and multiple access doors to temples. As in Petén, roof combs adorned principal structures. Palaces had multiple entrances that used post-and-lintel entrances rather than corbel vaulting. Many sites erected stelae, but Palenque instead developed finely sculpted panelling to decorate its buildings.