The princes in northern Germany, and the English people, the later mostly against their will.
Roman Catholic AnswerThat depended entirely on the individual prince. Most of the princes in northern Germany saw in Martin Luther's revolt a chance to free themselves from Rome, so they supported the break. The good Christian princes of Southern Germany were horrified that anyone would attempt to break with the Church that Our Blessed Lord founded for their salvation, and remained Catholic.
Hamburg is in northern Germany.
Germany is northern of the equator, and is therefore, in the northern hemisphere.
Denmark is located on the northern border of Germany.
The City Municipality of Bremen is located in northern Germany.
The Kingdom in Prussia, and Sweden, most of what became northern Germany were protestant, and Austria and what became southern Germany were Catholic under the Empire's rule that everyone in a principality had to be the religion of the prince. Throughout this entire century, the various princes fought and they were oftentimes of different religions.
Roman Catholic AnswerIn England, Henry VIII split from the Catholic Church over the Church not allowing him to divorce his lawfully wedded wife. In Germany the princes in northern Germany used Martin Luther as an excuse to free themselves from Rome.
Actually, the Lutheran Church did not technically "break off" from the Catholic Church. The Lutheran Church was made up out of whole cloth by the princes of northern Germany in 1517, I believe.
Lutheran princes
Germany is in Northern Europe, in the Northern Hemisphere.
Apostolic Vicariate of Northern Germany ended in 1930.