Marcel Duchamp:

* Widely regarded as one of the most important and influential artists of the 20th century.
* Known for his provocative and conceptual works that challenged conventions of art.
* His influence can be seen in movements such as Dada and Surrealism, and later artists like the Pop artists of the 1960s.

Gerhard Richter:

*  Considered one of the most important contemporary artists.
*  Known for his diverse range of styles and techniques, including photo-realistic paintings, abstract works, and installations.
*  His works often engage with issues of history, memory, and the relationship between images and reality.
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