Santísima Trinidad or Most Holy Trinity was a fortress in the

Captaincy General of Chile The General Captaincy of Chile (''Capitanía General de Chile'' ), Governorate of Chile, or Kingdom of Chile, was a territory of the Spanish Empire from 1541 to 1818 that was, initially, part of the Viceroyalty of Peru. It comprised most of mod ...

that existed on the north shore of the Bio-Bio River in what is now the Bío Bío Province. It was built directly across the river from Fort Espíritu Santo by the

Royal Governor of Chile The royal governor of Chile ruled over the Spanish colonization of the Americas, Spanish colonial administrative district called the Captaincy General of Chile, and as a result the royal governor also held the title of a captain general. There w ...

Alonso de Sotomayor in 1585. It was abandoned by the same governor in 1591 and destroyed by the Indians in the great rising of the

Mapuche The Mapuche ( , ) also known as Araucanians are a group of Indigenous peoples of the Americas, Indigenous inhabitants of south-central Chile and southwestern Argentina, including parts of Patagonia. The collective term refers to a wide-ranging e ...

that followed the death of Governor Martín García Óñez de Loyola. It was constructed again in 1603 by Governor Alonso de Ribera but it disappeared few years later.

Sources

Francisco Solano Asta-Buruaga y Cienfuegos, Diccionario geográfico de la República de Chile, D. Appleton y Compania, Nueva York, 1899
pg.842 Arauco War Buildings and structures in Biobío Region Colonial fortifications in Chile {{Chile-struct-stub