• New Castle Court House - NPS

    First State

    National Monument DE,PA

Contact Us

Superintendent
First State National Monument
National Park Service
c/o New Castle Court House Museum
211 Delaware Street
New Castle, DE 19720

(302) 544-6363


Did You Know?

A trail through a grassy open field recedes into the horizon

The Woodlawn property at First State National Monument contains the demarcation line known as the "12-mile arc," which is a part of a circle drawn from the Old New Castle Courthouse that established the boundary between British colonies of Pennsylvania and Delaware in the 17th century.