Reducción de Santa María la Mayor, Argentina

Reducción de Santa María la Mayor, located in the Santa María Department of the Misiones Province, Argentina, at approximate coordinates 27°33′S 55°20′W, was one of the missions or reductions founded in the 17th century by the Jesuits in the Americas during the Spanish colonial period. In 1984 it was one of four reduction sites in Argentina designated as World Heritage Sites by UNESCO.

Source: Wikipedia