An Antebellum-style dress, complete with all the appropriate undergarments.
A few years ago, a CD who was a member of the same group I was, owned an Antebellum dress and all the appropriate undergarments. She looked beautiful, whenever she wore it, very formal looking and effeminate.
I rented one from a costume shop years ago and participated in a historical event. I can recall having to be assisted by a woman who was experienced in the correct order of putting on the undergarments, followed by the dress and outer garments.