Portrait painting by Anton Graff, LeadArt oil painting just do reproduction of them in museum quality on linen canvas:

Anton Graff (November 18, 1736 – June 22, 1813) was an eminent Swiss portrait artist. Among his famous subjects were Friedrich Schiller, Christoph Willibald Gluck, Heinrich von Kleist and Fredrick the Great, and Moses Mendelssohn. His pupils included Emma Körner.
Graff was born as the son of a craftsman in Winterthur. There and in Ansbach he learned to paint, in the latter place assisting the court painter Schneider. In 1766 he was appointed court painter and professor at the Dresden Art Academy. He did portraits of nearly 1,000 of his contemporaries. He was "the leading exponent of the middle-class portrait in Germany in the late 18th century and the early 19th, and he was the main portrait painter of German poets between the Enlightenment and the early Romantic periods". In his later years he turned to painting landscapes, and developed further a sparkling manner of painting that anticipated Impressionism. He died in Dresden at the age of 76. Graff was a prolific artist; some 2,000 of his paintings and drawings survive. Many are displayed at the Goethe Museum in Frankfurt and at the Städtische Galerie in Dresden.