Two Indigenous Settlements That Survived the Spanish Conquest Registered in Guerrero's Costa Grande

Mexico's National Institute of Anthropology and History (INAH) announced on July 20, 2026, the formal registration of two archaeological sites in the Costa Grande region of Guerrero — Camutla and Sacualpan (the latter previously recorded as "Los Ticuiches") — documented in 16th-century Spanish sources including the Relaciones Geográficas and the Ortelius map, and inhabited continuously from the Late Postclassic period (c.1200) through the early colonial era until abandonment at the end of the 16th century. The inspection, led by archaeologist Rodolfo Lobato Rodríguez and conducted March 25–30, 2026 via ground survey and drone mapping ahead of the Pátzcuaro–Lázaro Cárdenas highway expansion near the municipality of La Unión de Isidoro Montes de Oca, documented Camutla — 39 structures including terraces, altars, retaining walls, plazas, and stelae across 8 hectares on a hill above the lower La Unión River near the community of El Chico (Capire) — and Sacualpan, dominated by a 160m-by-110m L-shaped ceremonial platform complex with surrounding residential mounds. INAH specialists note the zone was a pre-Hispanic frontier region inhabited by Tolimeca and Chumbia groups, subdued in turn by the Aztec Triple Alliance and the Purépecha (Tarascan) empire before Spanish conquest. That both communities remained inhabited for decades after the conquest — before Spanish colonial authorities reorganized settlement patterns and imposed new taxation (encomienda/repartimiento) systems under New Spain — provides physical evidence of Indigenous adaptation and cultural persistence in the immediate post-conquest period.