Built during 1640s

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Common Burying Ground and Island Cemetery (Newport County, Rhode Island)
Common Burying Ground at Sandy Bank (Middlesex County, Massachusetts)
Dogham (Charles City County, Virginia)
Durham Historic District (Strafford County, New Hampshire)
Felton, Nathaniel, Houses (Essex County, Massachusetts)
Fish Flake Hill Historic District (Essex County, Massachusetts)
Fort Pickering (Essex County, Massachusetts)
Fort Sewall (Essex County, Massachusetts)
Hancock Cemetery (Norfolk County, Massachusetts)
Madison Green Historic District (New Haven County, Connecticut)
Newman Cemetery (Providence County, Rhode Island)
Old Bay Road (Bristol County, Massachusetts)
Palmer-Northrup House (Washington County, Rhode Island)
Pratt House (Middlesex County, Connecticut)
Printzhof, The (Delaware County, Pennsylvania)
Putnam, Gen. Israel, House (Essex County, Massachusetts)
Richard Sparrow House (Plymouth County, Massachusetts)
Sachem Rock Farm (Plymouth County, Massachusetts)
Saugus Iron Works National Historic Site (Essex County, Massachusetts)
St. Ignatius Roman Catholic Church (St. Mary's County, Maryland)
Tantiusques Reservation (Worcester County, Massachusetts)
Town Line Boundary Marker (Barnstable County, Massachusetts)
Town Line Boundary Marker (Barnstable County, Massachusetts)
Water Mill (Suffolk County, New York)
Whipple, John, House (Essex County, Massachusetts)
Wing Fort House (Barnstable County, Massachusetts)
Yantic Falls Historic District (New London County, Connecticut)