Complex sentence: The town was significantly expanded under Christian IV of Denmark after his coronation in 1596 by the addition of new city districts and modern fortifications with earthworks and bastions, and Christian IV commissioned German and Dutch architects and craftsmen to construct magnificent edifices designed to enhance his prestige.
Split into simpler sentences: The town was significantly enlarged under Christian IV of Denmark after his coronation in 1596 by the addition of new city districts and modern fortifications with earthworks and bastions. The king commissioned German and Dutch architects and craftsmen to construct magnificent edifices designed to enhance his prestige.