1715-1718 Elżbieta Sieniawska by Ádám Mányoki (Magyar Nemzeti Galéria, Buda Castle - Budapest Hungary)
This woman who smoked like a man was called an "Amazon." She maintained an open marriage, at least for her. With all of this going on, she maintained considerable power and she was called the "unofficial Queen of Poland." She supported Hungarian independence. Her Wikipedia article is here.
From Wikimedia; spots throughout image and one scratch fixed with Photoshop by gogm.