![](http://www.alamy.com/thumbs/6/43A75739-ECC3-4E9D-8ACD-3B997D69B593/MW2NJ0.jpg)
. English: Russian-born German astronomer Viktor Karlovich Knorre . circa 1870. Unknown photographer 630 Victor Knorre
Size: 1790px × 2792px
Photo credit: © The Picture Art Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., /, /., 1870., circa, photographer., unknown