 The viceroy took possession of his office on November 21, 1667, in Lima.In 1665 the rich mineowners José and Gaspar Salcedo, brothers from the province of Paucarcolla (now part of Puno region), revolted against the colonial government.The brothers had discovered the very rich Laykakota silver mines in 1657, and by this time were probably the richest men in Latin America.