Figure: The Religious Situation in Europe about 1560
Caption: The religious division of Europe circa 1560.
Further explication:
As a Roman Catholic official (a canon law lawyer) in the Poland region---which as one can see is on the borderline of the religious divide---Copernicus must have been acutely conscious of the religious strife of his age.
Credit and/or file tracking information follows to the divider line:
Credit/Permission: Willliam R. Shepherd (1871--1934), Historical Atlas (1923,1926) / Public domain.