noun
historian
his-TOR-ee-un/hɪˈstɔːriən/
A person who studies or writes about the past.
The historian studies old maps and archival photographs at the library table.

Etymology
An “account of past events” supplies the central connection: a historian writes such accounts. The base also carries an older sense of knowledge gained through inquiry, linking historical writing with investigation.
In context
That's why in today's episode, we have the historian Dr. Vikram Sampath to talk about the history which we have not learned in school.
More examples
- Historians disagree about what caused the war.
- A local historian writes a book about our town.
- The museum invites a historian to explain the photographs.
Forms
historian · historians
history noun — The study or record of past events.
historical adjective — Relating to the past or its study.
Similar words
- chronicler
- Records events in sequence, often without analyzing their causes.
- researcher
- Investigates a subject systematically, not necessarily the past.