13.9889°N, 89.6713°W.
Casa Blanca is an Early Postclassic ceremonial and residential complex in the Chalchuapa archaeological zone of western El Salvador, occupied principally between approximately 900 and 1200 CE alongside the larger neighboring center of Tazumal. The Chalchuapa zone contains some of the longest unbroken occupational sequences in Mesoamerica, beginning around 1500 BCE. Casa Blanca itself comprises six platform mounds of stone and adobe rising to 8 metres in height, organized around a small central plaza. The site was systematically excavated and consolidated by a Salvadoran-Japanese project led by Nobuyuki Ito beginning in 1990, with the on-site Museo Casa Blanca opened in 2003. The complex shows both Maya and central Mexican influences in its ceramics and architecture, reflecting the cultural mixing characteristic of Postclassic western El Salvador after the regional Maya collapse.
The principal mound stands consolidated, with the original earthen ramp of the access stairway exposed by the conservators behind protective fencing.