Baron Johann Knoop, was a collector of musical instruments who possessed a total of 29 great violins, violas, and cellos at one time or another including some four Stradivari violas. Several instruments are named after him:Baron Knoop Stradivarius (1698)
- Occupation
- general manager
- Citizenship
- Russian Empire
- Born
- July 22, 1846
- Died
- May 9, 1918
