There have been many important architects throughout the 20th century, each with their own unique contributions to the field. Here are some of the most notable ones:

1. Frank Lloyd Wright: An American architect who designed over 1,000 structures and is known for his organic architecture and innovative use of materials.
2. Le Corbusier: A Swiss-French architect who developed the International Style of architecture, which emphasized simplicity and functionality.
3. Ludwig Mies van der Rohe: A German-American architect who was a pioneer of modernist architecture, and is famous for his phrase "less is more."
4. Walter Gropius: A German architect and founder of the Bauhaus school of art and design, which emphasized the integration of craft and industry.
5. Frank Gehry: A Canadian-American architect known for his avant-garde designs and use of unconventional materials, such as titanium and chain-link.
6. Zaha Hadid: An Iraqi-British architect who was the first woman to receive the Pritzker Architecture Prize,
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