What is this European pattern and what does it symbolize, please?

Florence city coat of arms

Represents the lily of the valley

Quote: This wall symbol, pictured below, was seen all over the city of Fiorentina on my travels this year: what we have always thought of as the "lily of the valley."

It is the symbol that Cosimo, a Medici family member, won from the French royal family, and is therefore used all over the city of Fiorentina. It can be seen everywhere, and is also their coat of arms

Again, it's used in France.

It's called fleur de lis.

The lily is a symbol of the Virgin Mary, and is often used to decorate statues of the Virgin Mary, etc.

And the yellow iris has the word "victory" in its language, because it helped a French king win a war.