Vivar was born in Santiago, the son of José de Melchor de Vivar y de la Rocha and of Juana Ruiz de Azúa y Amasa Yturgoyen. He studied Theology at the Universidad Real de San Felipe, where he got a doctorate, and was later ordained as a priest. Vivar actively participated in the independence movement in Chile. On October 31, 1812, he was elected the first President of the Consultive Senate of Chile, and remained as such until the closing of the sessions in January 1814, when the Spanish "reconquista" dissolved the domestic institutions. He died in the city of Santiago on 1820, at the age of 78.
| President of the Senate of Chile
José Antonio Errázuriz
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