British Museum | Museum of Modern Art | Salzburg | Metropolitan Museum of Art | American Museum of Natural History | Victoria and Albert Museum | Natural History Museum | San Francisco Museum of Modern Art | Honolulu Museum of Art | museum | Whitney Museum of American Art | Museum of Fine Arts, Boston | Los Angeles County Museum of Art | Solomon R. Guggenheim Museum | National Air and Space Museum | Brooklyn Museum | National Baseball Hall of Fame and Museum | Hermitage Museum | National Museum of Racing and Hall of Fame | Museum of Contemporary Art | Field Museum of Natural History | Philadelphia Museum of Art | Imperial War Museum | Smithsonian American Art Museum | National Museum | Salzburg Festival | National Museum of Natural History | Museum of Fine Arts, Houston | Denver Art Museum | Cleveland Museum of Art |
During the years as Landeshauptmann of Salzburg, from 1996 to 2004, he initiated the construction of the football stadium Salzburg-Kleßheim, the construction of the Museum of Modern Arts on the Mönchsberg, the reconstruction of the Kleines Festspielhaus (House for Mozart) and the construction of the Museum Carolino Augusteum at the Mozartplatz.