Short answers, pulled from the story.
Dora Stock (the 6th of March 1759 - the 30th of May 1832) was a German portraitist who specialized in pastels, oils, and silverpoint. She is best known for producing what is widely considered the last portrait of Mozart made from life, drawn during his visit to Dresden in April 1789. She was also a central figure in the literary and musical salon run by her sister Minna and brother-in-law Christian Gottfried Körner in Dresden.
The Dora Stock silverpoint portrait of Mozart is widely considered to be the last portrait made from life. Stock sketched it on ivory board on either the 16th or the 17th of April 1789, when Mozart visited the Körner home in Dresden during a spring concert journey. The portrait measures 7.6 by 6.0 centimeters and is now held by the International Mozarteum Foundation in Salzburg.
At the end of 2005, the heirs of Albi Rosenthal sold the Dora Stock Mozart portrait to the International Mozarteum Foundation in Salzburg for 250,000 British pounds. Because the work is very fragile, only a replica is on display; the original is kept in the foundation's protective vaults.
The Körner household in Dresden, shared by Dora Stock, her sister Minna, and brother-in-law Christian Gottfried Körner, became a leading literary and musical salon in the late 18th and early 19th centuries. Guests included Goethe, Schiller, Johann Gottfried von Herder, Wilhelm von Humboldt, the Schlegel brothers, Novalis, Ludwig Tieck, and musicians including Mozart, Weber, Johann Naumann, Johann Hiller, and Karl Zelter.
Dora Stock was a lifelong friend of Friedrich Schiller. In 1784 she initiated their friendship by sending Schiller an anonymous gift package that included a miniature portrait she had painted of each of the four senders. Schiller later lived in the Körner household for two years, and Dora painted three portraits of him. She also performed in private premieres of his plays, playing the first Joan of Arc in The Maid of Orleans.
Dora Stock learned drawing and engraving at the workbench of her father, Johann Michael Stock, a copper engraver who worked for the Breitkopf printing and publishing firm in Leipzig. She was regarded as his star pupil. She later studied with the painters Adam Friedrich Oeser and possibly Anton Graff. After her father's death in 1773, she helped support the family by continuing his professional relationship with Breitkopf.