Pedro Ignacio Rivera was a Bolivia

Bolivia

Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

n-born statesman and lawyer. He was a representative to the Congress of Tucumán

Congress of Tucumán

The Congress of Tucumán was the representative assembly, initially meeting in Tucumán, that declared the independence of the United Provinces of South America on July 9, 1816, from the Spanish Empire....

 which on 9 July 1816 declared the Independence of Argentina

Argentine Declaration of Independence

What today is commonly referred as the Independence of Argentina was declared on July 9, 1816 by the Congress of Tucumán. In reality, the congressmen that were assembled in Tucumán declared the independence of the United Provinces of South America, which is still today one of the legal names of the...

.

Rivera was born in Mizque

Mizque

Mizque is a town in the Cochabamba Department, Bolivia. It is the capital of the Mizque Province. Mizque is located in the valley of the Mizque River, one of the main tributaries of the Río Grande....

 (now Bolivia) and studied law at the University of Charcas. He was noted for his work with the poor as a lawyer.

Rivera was elected to represent Mizque at the 1813 Assembly

Asamblea del Año XIII

The Assembly of Year XIII was a meeting called by the Second Triumvirate governing the young republic of the United Provinces of the Río de la Plata on October 1812....

 and again to the Tucumán Congress, serving in 1816 for the declaration. He supported the idea of a constitutional Incan monarchy.