Joanna Koerten, (married name Joanna Block) (17 November 1650 in Amsterdam – 28 December 1715 in Amsterdam) was a Dutch artist who excelled in painting, drawing, embroidery, glass etching, and wax modeling. She achieved fame as a silhouette cutter, the art of creating outline images from pieces of cut paper mounted on a contrasting background. She produced landscapes, seascapes, flowers, portraits, and religious scenes in this medium. Her clients included Peter the Great of Russia, Frederick Elector of Brandenburg, Johan de Witt and William III of England.