>There are two possible and perhaps concurrent reasons why the three hares may have found popularity as a symbol within the church. Firstly, it was believed that the hare was hermaphrodite and could reproduce without loss of virginity.[26] This led to an association with the Virgin Mary, with hares sometimes occurring in illuminated manuscripts and Northern European paintings of the Virgin and Christ Child.
https://news.ycombinator.com/item?id=45955649
(By way of an "explanation" of the "3 boxes")
[1] https://en.wikipedia.org/wiki/Three_hares
>There are two possible and perhaps concurrent reasons why the three hares may have found popularity as a symbol within the church. Firstly, it was believed that the hare was hermaphrodite and could reproduce without loss of virginity.[26] This led to an association with the Virgin Mary, with hares sometimes occurring in illuminated manuscripts and Northern European paintings of the Virgin and Christ Child.