[2] Gabriel de Guilléstegui was born in Toledo, Spain in 1594 and ordained a priest in the Order of Friars Minor.
[3][4] On 15 December 1666, he was appointed during the papacy of Pope Alexander VII as Bishop of Paraguay.
[3] On 1 September 1670, he was appointed during the papacy of Pope Clement X as Bishop of La Paz.
[1][3] He served as Bishop of La Paz' until his death in 1677.
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