Dresses increased dramatically to the hoopskirt and crinoline-supported styles of the 1860s; then fullness was draped and drawn to the back by any dresses had a "day" bodice with a high neckline and long sleeves, and an "evening" bodice with a low neckline (decollete) and very short sleeves.
One may usually wear a bra, but for modesty wearing a camisole / vest or full slip is also an option for the top. Dresses are sometimes worn with tights.
