New Castle, city, New Castle county, northern Delaware, U.S. It is just south of Wilmington on the Delaware River, there linked to New Jersey by the twin spans of the Delaware Memorial Bridge. The original settlement, called Santhoeck, was established in
City Hall contains 700 rooms and 250 architectural reliefs and sculptures by Alexander Milne Calder, including a 37-foot, 27-ton statue of William Penn that stands atop the building’s main tower; the tip of his hat— almost 549 feet above ground level, or approximately 33 stories—was for...