Puno is a city in southeastern Peru, locate on the shore of Lake Titicaca, the world's highest navigable lake, at 3,860 m (12,421 ft) above sea level. It is also the capital and largest city of the Puno Region and the Puno Province. The city was established in 1668 by viceroy Pedro Antonio Fernández de Castro as capital of the province of Paucarcolla with the name San Juan Bautista de Puno. The name was later changed to San Carlos de Puno, in honor of king Charles II of Spain. The city boasts several churches dating back from the colonial period, they were built to service the Spanish population and evangelize the natives.