If only the seven weeks are considered, the time of fulfillment would be much earlier. The time of the coming of conquerors who destroy Jerusalem is at the end of this period. History states that it was 70 A.D. when the Roman army destroyed the city. That leaves an unexplained interval of at least thirty years. There is a discrepancy of figures involved in the interpretation.
Some versions state that a wall was built around the city.
Others state that it was a moat that was constructed. The Book of Nehemiah states that a wall was built. Maps show a wall, but not a moat or trench. The Hebrew word used to describe what it was can mean wall or trench , or a number of other words. Some versions mention streets and a square as well.