Hans Sommer was a German composer and mathematician.
Sommer was born Hans Friedrich August Zincke in Braunschweig in 1837.
Before going into music full-time, Sommer, who had studied mathematics and physics in Braunschweig and Göttingen, was also a... Wikipedia
Born: July 20, 1837, Braunschweig, Germany
Died: April 26, 1922 (age 84 years), Braunschweig, Germany