The document discusses two building projects that utilized innovative structural and enclosure systems: 1) The Lowara Office Building designed by Renzo Piano Building Workshop features a glass curtain wall facade. 2) Hall 26 at the Hanover Expo designed by Herzog and Partner and Schlaich Bergermann and Partner is a large span structure covered by a lightweight roof system allowing for natural ventilation and daylight while restricting direct sunlight. It uses renewable materials and conserves energy.