.        Major rivers A     Major cities | <20%
| 20-29% Protestant 1 30-39% Protestant | 40-49% Protestant
SO-59% Protestant 60-69% Protestant 70-79% Protestant 80-89% Protestant ?90% Protestant Remaining German Empire
figure p.2. The percentage of Protestants in Prussian counties in 1871." The map highlights some German cities, including the epicenter of the Reformation, Wittenberg, and Mainz, the charter town where Johannes Gutenberg produced his eponymous printing press.