Paintings of Pieter Bruegel the Elder (Pieter Bruegel l'Ancien) are very famous. Let's hunt some eggs... or ovoïd froms.
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Oil on wood
Museum Mayer van den Bergh, Antwerp
On the left (the egg in the nest under the roof) : "Leave at least one egg in the nest", meaning "Always have something in reserve".
On the right :Up : "To take the hen's egg and let the goose's egg go", meaning : "To make a bad decision".
Down : "To yawn against the oven", meaning : "To attempt more than one can manage".
From a list detailing the proverbs and meanings published by the Staatliche Museen zu Berlin and reproduced in Hagen pp.36-7. On wiki.
We also have to add The Egg Dance.
There are many websites concerning Bruegel, but I strongly recommand all-art.org. and this one for full resolution of many Bruegel's paintings.