Mirepoix (cuisine)
Similar flavour bases include the Italian "soffritto", the Spanish "sofrito", "refogado/sufrito" (braised onions, garlic and tomato) from Portuguese-speaking nations, the German "suppengrün" (leeks, carrots and celeriac), the Polish "włoszczyzna" (leeks, carrots, celery root and parsley root), the US Cajun / Creole holy trinity (onions, celery and bell peppers), and possibly the French "duxelles" (mushrooms and often onion or shallot and herbs, reduced to a paste).
Fleur-de-lis
The three petals of the heraldic design reflect a widespread association with the Holy Trinity, with the band on the bottom symbolizing Mary. The tradition says that without Mary you can not understand the Trinity since it was she who bore the Son. A tradition going back to 14th century France added onto the earlier belief that they also represented faith, wisdom and chivalry. Alternatively, the cord can be seen as representing the one Divine Substance (godhood) of the three Persons, which binds Them together.