Original Bimagic Square of Order 19. By H. Yuanli, W. Sutian, C. Qinwu and C. Mutian.
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China stamp on Magic Square from Macau:
Macau stamp featuring geometric magic square. On October 2014, the post office of Macau in the People´s Republic of China issued a series stamps based on Magic Squares. The figur above shows the stamps featuring the nine magic squares choosen to be in this collection. Read more in Article:
Macau´s magic square stamps just made philately even more nerdy. The Guardian Science, November 4, 2014.