 He in turn persuaded the Chases to accept the wrought iron fence out front, using the J.P. Morgan Library in Manhattan as an example of how that element could be successful.The addition of the bank building to the complex allowed Gilbert to use the three buildings to frame the view of the clock tower for westbound traffic on Grand Street.The entourage of City Hall and corresponding setback of the Chase Building allow the tower to dominate a wide open area.