1. Frank Lloyd Wright: The most famous building designed by Frank Lloyd Wright is the **Fallingwater house**, built in 1935. This house is a great example of Wright's organic architecture, which integrates the building into its natural surroundings. It is also an example of his innovative use of materials, such as concrete, glass, and steel.

2. Le Corbusier: Le Corbusier's most famous building is the **chapel of Notre Dame du Haut in Ronchamp, France**, built in 1955. This building is a great example of Corbusier's modernist style, which emphasizes geometric shapes and open spaces.

3. Ludwig Mies van der Rohe: Mies van der Rohe's most famous building is the **Seagram Building in New York City**, built in 1958. This building is a great example of his signature minimalist style of architecture, featuring simple and elegant lines and a sleek facade.

4. Walter Gropius: Walter Gropius' most famous building is the **Bauhaus** in Dessau, Germany, built in 1925. This building is a great example of Gropius' modernist style, which emphasizes functionality and minimalism.

5. Frank Gehry: Frank Gehry's most famous building is the **Guggenheim Museum in Bilbao**, built in 1997. This building is an example of Gehry's postmodernist style, which features daring, unconventional shapes and a fluid, dynamic form.

6. Zaha Hadid: Zaha Hadid's most famous building is the **Guangzhou Opera House**, built in 2010. This building is a great example of Hadid's iconic deconstructivist style, featuring curved surfaces and complex geometries.
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