Celtic couple by Peter Connolly

"The clothing they wear is striking — shirts which have been dyed and embroidered in varied colours, and breeches, which they call in their tongue bracae; and they wear striped coats, fastened by a buckle on the shoulder, heavy for winter wear and light for summer, in which are set checks, close together and of varied hues."

-Diodorus Siculus' Library of History: Book 5, Chapter 30

Source:

https://www.pinterest.com/pin/262334747027318416/

https://imtw.ru/topic/33704-pohod-za-mechtoi/page__st__150

Quote:

https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Diodorus_Siculus/5B*.html#30.1