Among the trees and the water streams of the Argentine province of Misiones, the proofs of a unique experience beat. The Jesuit Missions were part of a project that materialized in 1609 and that ended up having over eighty six thousand inhabitants. When the Jesuits founded the first guaraní reduction their objective was to incorporate original inhabitants of the region to the colonial organization of those days in a different manner: There would be towns inhabited only by guaranies and the European presence would be limited to the priests of the Company of Jesus. The Jesuits recreated the order through Catholicism. The model proved to be a success, as the absence of merciless violence for its implementation demonstrated. Four, out of the thirty towns that constituted the Jesuit Missions, have been declared World Heritage Site by UNESCO, and those are the focus of this book.