Joanna Koerten, (married name Joanna Block) (born 17 November 1650, Amsterdam died 28 December 1715, Amsterdam) is a Dutch artist considered one of the greatest masters of a silhouette in wax modeling. He worked with a lot of different materials, such as wax, paper, wood, glass and plants. Joanna was a wonderful painter, etcher and cutter. Her works varied from beautiful landscapes to powerful religious scenes, and her clients included Peter the Great of Russia, "Frederick Elector of Brandenburg", Johan de Witt and William III of England.

Examples of her work can be seen in the Stedelijk Musuem De lakenhal (Leiden), in the Koninklijk Bibliotheek (The Hague), and in Westfries Musuem (Hoom).

More Info: en.wiwkipedia.org