Paraguay, country with only one UNESCO World Heritage Site

And this is it: Jesuit Missions of La Santísima Trinidad de Paraná and Jesús de Tavarangue (Jesuit Mission of the Holy Trinity) is the only World Heritage site in Paraguay.
This is the testimony of the Jesuits' Christianization of the Río de la Plata basin in the 17th and 18th centuries. The site represents a fusion of cultures in which the process of Christianisation permitted the indigenous population to retain elements of their traditional culture.
Although today the missions are essentially archaeological ruins, their original layout followed a similar form, where the church was the centre of urban core.
What is unique about the Mission of Jesús de Tavarangue is the architectural expression, The Mudéjar (Christian-Arab) style.