The Jesuit mission of San Ignacio Mini was one of the larger missions founded in the early XVIIth century. Upon the expulsion of the Jesuit order from Spain and all its sominions, the missions declined. During the armed conflicts of 1814-1828, the settlement was burned down and abandoned. The restoration of the site was carried out in the forties. The remaining buildings are all in stone. The church and most of the buildings were constructed fromn a local red sandstone (Asperon Rojo). In some instances a marsh-ore (Ita Tacuru) was used. The stones do not present any serious deterioration problem except for the biological growth that tends to cover any available surface. From the point of view of the conservation of the site, the most urgent need is for a maintenance program.