“Brote”, an homage to his father, mayor of the city of Asunción who planted trees and created the green spaces of the city, is a sculpture inscribed within his optimistic themes. ”Historia”, presented at the Expo 92 in Sevilla, was selected by the organizers of the world event to be exposed at the entrance of the “Pabellon de las Americas”. His moral theme appeared in his “Cristo“, whose original is at the entrance of the church La Crucecita, in the Sajonia neighborhood, in Asunción. A copy of this work was presented at the X Bienal of São Paulo (1971) and obtained the Golden Medal; regarding this successful participation the critic Arnold Kohler, from Switzerland, said in the newspaper "Tribune de Geneve": ” There are two artist in the Bienal of Sao Paulo, both sculptors, who having followed different steps, one figurative and the other abstract, have reached a high perfection and spirituality. The first one, Hermann Guggiari, Paraguayan-created a form of an angel emerging from the wall, a dramatic and sublime work.“