Jesuit Missions of La Santísima Trinidad de Paraná and Jesús de Tavarangue are part of a series of 30 missions in the Río de la Plata basin established by the the Jesuits during the 17th and 18th centuries. Seven of these missions were located in Paraguay and the rest in the present-day countries of Argentina and Brazil. (source http://whc.unesco.org/en/list/648)
Unfortunately the card is heavily damaged. One stamp is missing.