Clearly people have always worn clothing to say certain things about their beliefs, social status, etc., but when did “fashion” as a concept come about?

“Luxury” is maybe an analogous example. From what I understand, the concept/term itself has origins in France not long before the Enlightenment, but clearly people had items that could be considered luxurious since long before that time.

In this sense, what is the moment where people begin directly addressing fashion as such?