What does the black square mean?

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Tags

1. #historical
2. #artists
3. #malevich
4. #known
5. #painting
6. #iconic
7. #square
8. #referring
9. #kazimir
10. #paraphrasing
11. #black
12. #significance
13. #curators
14. #invoked
15. #point
16. #frequently
17. #critics
18. #historians