In this period, revolts were common. Around 1656, Pedro Bohórquez crowned himself Inca (emperor) of the Calchaquí Indians, inciting the indigenous population to revolt. From 1665 until 1668, the rich mineowners José and Gaspar Salcedo revolted against the colonial government. The clergy were opposed to the nomination of prelates from Spain. Viceroy Diego Ladrón de Guevara had to take measures against an uprising of slaves at the hacienda of Huachipa de Lima. There were terrible earthquakes (1655, 1687) and epidemics, too.