You may not know his name, but you probably know his work. Ralph Rapson has put his mark on the Twin Cities as only an architect can -- in the buildings many of us see and live with nearly every day... the Guthrie Theater, the Cedar West highrise apartments, and many houses for people of modest and not so modest means. Perhaps most importantly -- he was head of the University of Minnesota school of architecture for 30 years --- educating the architects of the future. And now opening this weekend the first major retrospective on Rapson career along with a new book on his life and work.