polyhistor

noun

1. Someone gifted or learned to a great extent or in multiple disciplines; a great scholar.

   “A hired diplomat in Edirne and to the Porte in Constantinople, a military commander in the Austro-Turkish wars, a polyhistor and a learned man.”

   “[Carlfriedrich] Claus is an artist, though he does not like to call himself one, and a scholar. As such, he personifies the polyhistor, a species rarely found today.”