Countess Mary von Waldersee (3 October 1837 – 4 July 1914), born Mary Esther Lee, was an American-born philanthropist in Germany.
She was married in turn to Prince Frederick of Schleswig-Holstein-Sonderburg-Augustenburg and to Count Alfred von Waldersee, the successor of Field-Marshal von Moltke.
1880 Philadelphia, 1885 New York creating over 2,000 portraits for Appleton’s Cyclopedia of American Biography and most of the portraits for Scribner’s Cyclopedia of Painters and Paintings. From the early nineties untill his death he created countless etchings on copper.