sentences:  Ravnikar won a number of awards, including the 1987 Plečnik Award (Slovenia's national architecture award), the 2003 Prešeren Award (Slovenia's national art award), and the 2006 Herder Prize (an international award for achievement in science, art, or literature).From 1993 until his death, he worked as a professor at the University of Ljubljana.He worked as a guest professor at the University of Trieste, Trieste, Italy (2002), and the University of Trento, Trento, Italy (2004–2005).