A fleur-de-lis
[DOC] [TLE] The Fleur-de-Lys - Heraldica [PAR] Stained glass window in the shape of a fleur-de-lys, Bourges cathedral, 15th c. 
Note the various themes: the Trinity, which the 3 petals were understood to recall,
... [DOC] [TLE] fleur-de-lis | emblem | Britannica.com [PAR] Fleur-de-lis, ( French: lily flower) , also spelled fleur-de-lys, also called flower-de
-luce, stylized emblem or device much used in ornamentation and, particularly,... [DOC] [TLE] Historians say fleur-de-lis has troubled history - USA Today [PAR] Jul 10, 2015 ...