The 17th and 18th centuries were the eras of science. Two of the most impressive personalities of that time were Leonard Euler and Maria Sibylla Merian (who in fact were related). Leonard Euler was a famous mathematician who rendered outstanding services to the number pi. Maria Sibylla Merian was not only a naturalist and explorer but also an artist. Her name stands for the style of detailed portrayal of nature – see her works on the metamorphosis of caterpillars to butterflies. The illustrations in this card game shall breathe life into that style again.
The name Pi mal Pflaumen is a play on the expression "Pi mal Daumen" — "rule of thumb" or "roughly" — which also originated in that period, but now instead of thumbs, players are concerned with fruit.
