Twenty years ago today, Expo 2000 Hannover welcomed visitors to envision what the theme “Humankind – Nature – Technology” could mean in the 21st century. Here are a few interesting facts about this World Expo:

Venezuelan architect and activist José “Fruto” Vivas occupies the V spot in the A to Z series. Already celebrated in his home country for his bold creations such as the Club Táchira, Vivas was selected to design Venezuela’s Pavilion at World Expo 2000 Hannover.

Following on from Tadao Ando, the A to Z of Expo Architects continues with another Japanese Pritzker laureate: Shigeru Ban.

A pioneer in the development of temporary buildings for disaster victims, Ban teamed up with Frei Otto to create a unique pavilion for Japan at World Expo 2000 Hannover: one of the world’s largest paper-tube structures.