Gottfried Silbermann (1683-1753) and J.S. Bach were good friends and colleagues. Silbermann was a prominent builder of keyboard instruments in Germany, having received the title of Honorary Court and State Organ Builder to the King of Poland and Duke of Saxony at Dresden.
Silbermann consulted Bach on ways to improve the design of his early fortepiano prototypes. Once those improvements were made, Bach is known to have aided Silbermann in the sale of at least one of his new pianos.
Learn more on this website devoted to the Gottfried Silbermann Society.