Christoph Bernhard Francke

In 1693, he became a Leutnant in the service of Duke Rudolf Augustus of Braunschweig-Wolfenbüttel, but appears to have served primarily as a court painter.

In 1700, Rosine Elisabeth Menthe, the Duke's morganatic wife, became their first child's godmother.

That same year, he received an official appointment as "Fürstlichen Kunst- und Porträtmaler".

A portrait of the Tsarevich Alexei, who had married Princess Charlotte, is one of his few portrayals of people outside the direct family lineage.

His best-known painting, however, is of the philosopher Gottfried Wilhelm Leibniz, who was attached to the court in Braunschweig.