This is a great example of an empire dress, named for Empress Josephine, who popularized the style. That places it roughly at the beginning of the 19th century during the time of Napoleon. The scarf is silk and from Turkey. I can't imagine walking outside in this dress and getting that train dirty!
This dress is from roughly the first half of the 19th century, and has some amazing embroidery on it. I believe the embroidery is all hand worked, as the machine embroideries didn't become common until later.
This is from around 1860-70, due to the bustle which became fashionable around that time. Many of the clothes were made by the early sewing machines, and I think that the embroideries on this dress were made by machine.
I hope I haven't made too many mistakes on the descriptions of these dresses. Have a great Sunday!