Step 1: Understanding the question.
The question refers to the year when the historian Leopold von Ranke passed away. He is known as the founder of modern source-based historical writing. Step 2: About Leopold von Ranke.
Ranke was a German historian who emphasized primary sources and objectivity in historical research. His death marked the end of an important era in historical scholarship. Step 3: Important Dates.
- Born: 1795
- Died: 1863 Step 4: Conclusion.
Therefore, Leopold von Ranke died in the year 1863.