Like others have said, the lily you saw are likely related with papal coats of arms. In general, popes often embedded their coats of arms into the monuments and villas they built.
Symbologically speaking, the fleur-de-lys is generally associated with various religious symbols such as the Blessed Mother, St. Joseph and purity in general, which is why we find them so often in heraldry (like you said the Bourbon coat of arms but even before then it’s always been a symbol of France since the Frankish king Clovis’ conversion), the Italian city of Florence, the French city of Lille, the British House of Lancaster and an uncountable number of Italian comuni.
Like others have said, the lily you saw are likely related with papal coats of arms. In general, popes often embedded their coats of arms into the monuments and villas they built.
Symbologically speaking, the fleur-de-lys is generally associated with various religious symbols such as the Blessed Mother, St. Joseph and purity in general, which is why we find them so often in heraldry (like you said the Bourbon coat of arms but even before then it’s always been a symbol of France since the Frankish king Clovis’ conversion), the Italian city of Florence, the French city of Lille, the British House of Lancaster and an uncountable number of Italian comuni.