Which area of Germany became predominately Lutheran?

The area of Germany that became predominantly Lutheran is the northern region, particularly the states of Schleswig-Holstein, Hamburg, and parts of Lower Saxony and Saxony. This transformation occurred during the Reformation in the 16th century, largely influenced by Martin Luther's teachings. The rise of Lutheranism in these areas was supported by local princes and rulers who adopted the faith for both religious and political reasons. As a result, Lutheranism became the dominant form of Christianity in northern Germany.