13 South William Street
Listed on the
National Historic Register,
this building was built in 1837-1839.
In 1903 architect C.P.H. Gilbert
converted it into its current
Neo-Dutch Renaissance style.
Today the building is home to
America's oldest security agency,
McRoberts Protective Agency, Inc.,
which was founded in downtown
Manhattan in 1876.
Marker is on South William Street.
Courtesy hmdb.org
