Complex sentence: Dürer's godfather was Anton Koberger, who left goldsmithing to become a printer and publisher in the year of Dürer's birth and quickly became the most successful publisher in Germany, eventually owning twenty-four printing-presses and having many offices in Germany and abroad.
Split into simpler sentences: Dürer's godfather was Anton Koberger, who left goldsmithing to become a printer and publisher in the year of Dürer's birth. He quickly became the most successful publisher in Germany, eventually owning twenty-four printing-presses and having many offices in Germany and abroad.