This pattern is a gown from Queen Mary 11,of Holland and England 1686.
A little piece of history.
Queen Mary 11 Lived from 30th April 1662 to 28th December 1694. She became Queen Mary 11 of England and Ireland on 22nd January 1689 and of Scotland on 4th April, 1689. In each case she ruled as joint monarch with her husband William of Orange until her death.
Scroll down to the third portrait.