Please add punctuation to this: Not all of the area between the city and the Citadel what had been named New Copenhagen had been built upon and Frederik V decided to devote his citybuilding efforts to the parts of New Copenhagen which had not yet been built upon
Not all of the area between the city and the Citadel, what had been named New Copenhagen, had been built upon and Frederik V decided to devote his city-building efforts to the parts of New Copenhagen which had not yet been built upon.