Born: December 14, 1812, Stockholm, Sweden.
Died: October 17, 1897, Stockholm, Sweden.
Buried: Norra Begravningsplatsen (Northern Cemetery), Solna, Sweden.
Dannström enrolled in the Academy of Music at age 14, though his father wanted him to work in business. However, he was eventually able to do further music study, and toured Germany, France and Italy (1837–41).
After returning to Stockholm, he dabbled in theater, then became a music teacher, and opened a piano shop in 1856.
If you know where to get a good photo of Dannström (head & shoulders, at least 200×300 pixels),