Above: Hildegard of Bingen, a medieval polymath, shown dictating to her scribe in an illumination from Liber Scivias

I like this expression (a little known synonym for “renaissance man”). Homo universalis:

A different name for the secondary meaning of polymath is Renaissance Man (a term first recorded in written English in the early twentieth century). Other similar terms also in use are Homo universalis and Uomo Universale, which in Latin and Italian, respectively, translate as “universal person” or “universal man”. These expressions derived from the ideal in Renaissance Humanism that it was possible to acquire a universal learning[5] in order to develop one’s potential, (covering both the arts and the sciences and without necessarily restricting this learning to the academic fields). This was possible largely because the collective knowledge of humanity was far smaller back then than it is today .