New Castle County, Delaware On November 6, 1674, New Amstel was made dependent on New York Colony, and was renamed New Castle on November 11, 1674. On September 22, 1676, New Castle County was formally placed under the Duke of York's laws. It gained land from Upland County on November 12, 1678. On June 21, 1680, St. Jones County was carved from New Castle County. It is known today as Kent County, Delaware. On August 24, 1682, New Castle County, along with the rest of the surrounding land, was transferred from the Colony of New York to the possession of William Penn, who established
Hever Castle is now open to the public as a tourist attraction. There have been three main periods in the construction of this historic castle. The oldest part of the castle dates to 1270 and consisted of the gatehouse and a walled bailey. The second period was when the castle, then in need of repair, was converted into a manor in 1462 by Geoffrey Boleyn, younger brother of Thomas Bolyen, Master of Gonville Hall, Cambridge. He added a Tudor dwelling within the walls. The third period of repair and renovation was in the 20th century, when it was acquired by William Waldorf