Glee! Triumph! Maniacal cackling! Finally, the white regency gown I've been wanting for a long time. Yes, I snatched it up from Etsy.
During the 18th century and early 19th century, Europeans had a renewed interest in antiquity. This interest spread into fashion where it became the rage for ladies to dress in gowns reminiscent of Greek goddesses and Roman empresses. Fashionable ladies dressed in gowns that emphasized simplicity and the natural body shape. They often wore white muslin though to show off their high social status; white gowns were difficult to keep clean and wash without many servants.
Ah, look at that classical Roman-Grecian influence. It's as the gown is a miniature of this painting.
Ancient Roman Dress