Vexillology

Vexillology (from the Latin vexillum, "flag") is the study of flags. The term was coined by American vexillologist Whitney Smith.

Every major country has its own vexillological organization, such as The Flag Institute of Britain and the North American Vexillological Association, but they are members of the FIAV (International Federation of Vexillological Associations), also co-founded by Whitney Smith.