Over the years, fire destroyed major parts of the city many times, as many of the city's buildings were built entirely of wood. After the last fire in 1624, which lasted for three days, Christian IV of Denmark decided that the old city should not be rebuilt again. His men built a network of roads in Akershagen near Akershus Castle. He demanded that all citizens should move their shops and workplaces to the newly built city Christiania, named as an honor to the king.