Germany the state - indeed, but German as a culture/language/nationality(in the contemporary definition) was definitely there.
Same with Italy, which wasn't a single state until the mid XIX century. Over to the east states lost independence and remained so for hundreds of years, only to re-emerge in the XX century.
My point is that state as an entity doesn't fully define one's identity.
He was born in the County of Flanders, current day East Flanders and moved to Germany at the age of 40.
https://en.wikipedia.org/wiki/Gerardus_Mercator