Jørn Utzon, a Danish architect, designed the Sydney Opera House, which is known for its unique and iconic design.

Frank Lloyd Wright, an American architect, designed the Fallingwater house, which is considered one of the most iconic examples of organic architecture.

I.M. Pei, a Chinese-American architect, designed the glass pyramid at the Louvre Museum, which has become a landmark in Paris.

Frank Gehry, a Canadian-American architect, designed the Guggenheim Museum in Bilbao, which is known for its striking and unconventional design.

Adrian Smith, an American architect, is known for designing the Burj Khalifa, which is the tallest building in the world.

Cesar Pelli, an Argentine-American architect, designed the Petronas Towers, which were the tallest buildings in the world from 1998 to 2004.

Antoni Gaudí, a Spanish architect, designed the Sagrada Família, which is a large and unfinished Roman Catholic church in Barcelona.

John Bradfield, an Australian engineer, designed the Sydney Harbour Bridge, which is one of the most iconic landmarks in Sydney.

Eero Saarinen, a Finnish-American architect, designed the TWA Flight Center, which is known for its futuristic and iconic design.

Dominique Perrault, a French architect, designed the National Library of France, which is one of the largest libraries in the world.

Renzo Piano, an Italian architect, designed the Pompidou Center, which is a cultural center in Paris known for its unique and unconventional design.

Rem Koolhaas, a Dutch architect, designed the CCTV Headquarters, which is a distinctive and controversial building in Beijing.

Frank Gehry, a Canadian-American architect, designed the Walt Disney Concert Hall, which is known for its striking and unconventional design.

Herzog & de Meuron, a Swiss architecture firm, designed the Tate Modern, which is a modern art museum in London.

Herzog & de Meuron, a Swiss architecture firm, designed the Beijing National Stadium, which was built for the 2008 Summer Olympics.