![](http://www.alamy.com/thumbs/6/81900AD5-5D6F-4171-B327-8EE6B2A558D4/MY517B.jpg)
. English: Russian-born German astronomer Viktor Karlovich Knorre . circa 1870. Unknown photographer 549 Victor Knorre
Size: 1790px × 2792px
Photo credit: © The Picture Art Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., /, /., 1870., circa, photographer., unknown