More conflict arose after the Imperial city of Kempten from 1527 onwards converted to Protestantism in direct opposition to the Catholic monastery.
The citizens signed the 1529 Protestation at Speyer and the 1530 Augsburg Confession.
In turn, Kempten Abbey joined the Catholic League in 1609.
During the Thirty Years' War, the monastery buildings were burnt to the ground by Swedish troops in 1632.

From 1651, the Kempten Prince-abbot Roman Giel of Gielsberg commissioned a princely residence and the new abbey church St. Lorenz Basilica, one of the first major churches to be built after the war in Germany.
Still in 1706, 
Kempten was the center of a religious controversy, when the abbot confiscated a Reformed church, which provoked King Frederick I of Prussia to confiscate all Benedictine properties until the church was returned.
More conflict arose after the Imperial city of Kempten from 1527 onwards converted to Protestantism in direct opposition to the Catholic monastery. The citizens signed the 1529 Protestation at Speyer and the 1530 Augsburg Confession. In turn, Kempten Abbey joined the Catholic League in 1609. During the Thirty Years' War, the monastery buildings were burnt to the ground by Swedish troops in 1632.
From 1651, the Kempten Prince-abbot Roman Giel of Gielsberg commissioned a princely residence and the new abbey church St. Lorenz Basilica, one of the first major churches to be built after the war in Germany. Still in 1706, 
Kempten was the center of a religious controversy, when the abbot confiscated a Reformed church, which provoked King Frederick I of Prussia to confiscate all Benedictine properties until the church was returned.
Princely Abbey of Kempten