Copper

A. Conger Goodyear House (Nassau County, New York)
A. J. Schwartz House (Saline County, Kansas)
Abbey, The (Volusia County, Florida)
Abbotsford (Suffolk County, Massachusetts)
Abram Gaar House and Farm (Wayne County, Indiana)
Acworth Silsby Library (Sullivan County, New Hampshire)
Adams Memorial Library (Du Page County, Illinois)
Adelaide L. T. Douglas House (New York County, New York)
Administration/Science Building (Maricopa County, Arizona)
Adriance Memorial Library (Dutchess County, New York)
Akin Free Library (Dutchess County, New York)
Aladdin Theater (Brevard County, Florida)
Alamo National Bank Building (Bexar County, Texas)
Alamo National Bank Building (Bexar County, Texas)
Albert S. Sholes House (Washington County, Oregon)
Alden B. Dow House and Studio (Midland County, Michigan)
Alexander Bache U.S. Coast Survey Line (Charleston County, South Carolina)
Alfred M. Glossbrenner Mansion (Marion County, Indiana)
All Saints Catholic Church (Guthrie County, Iowa)
All Souls Congregational Church (Penobscot County, Maine)
Alonzo Foringer House and Studio (Bergen County, New Jersey)
Alpha Tau Omega Fraternity House (Tippecanoe County, Indiana)
Alphonse Gaulin Jr., House (Providence County, Rhode Island)
Anclote Key Lighthouse (Pinellas County, Florida)
Andrew Carnegie Library (Snohomish County, Washington)
Andrew G. Anderson House (St. Louis County, Minnesota)
Andrew Wylie House (Monroe County, Indiana)
Ansonia Library (New Haven County, Connecticut)
Apthorp Apartments (New York County, New York)
Ardmore Municipal Auditorium (Carter County, Oklahoma)
Arkansas State Capitol (Pulaski County, Arkansas)
Arnold and Gertrude Goss House (Washtenaw County, Michigan)
Asheville High School (Buncombe County, North Carolina)
Astro Theater (Douglas County, Nebraska)
Atalaya (Georgetown County, South Carolina)
Attucks School (Jackson County, Missouri)
Auburn Public Library (Androscoggin County, Maine)
Audubon Terrace Historic District (New York County, New York)
B. Lowenstein & Brothers Building (Shelby County, Tennessee)
B.M.C. Durfee High School (Bristol County, Massachusetts)
Bailey Farm Windmill (Somerset County, Maine)
Bailey Island Library Hall (Cumberland County, Maine)
Baltimore Grand (Baltimore, Maryland)
BANCROFT (motor vessel) (Baltimore, Maryland)
Bank of the Metropolis (New York County, New York)
Barbizon Hotel for Women (New York County, New York)
Bardwell-Ferrant House (Hennepin County, Minnesota)
Barr Building (Bexar County, Texas)
Barrington Civic Center (Bristol County, Rhode Island)
Barrowville (Baldwin County, Georgia)
Bartholomew County Courthouse (Bartholomew County, Indiana)
Batesville Historic District (Panola County, Mississippi)
Battell Park Historic District (St. Joseph County, Indiana)
Bayou Bend (Harris County, Texas)
Beckham County Courthouse (Beckham County, Oklahoma)
Beiger House (St. Joseph County, Indiana)
Belhurst Castle (Ontario County, New York)
Belmont Public Library (Belknap County, New Hampshire)
Benedict Fenwick School (Suffolk County, Massachusetts)
Benjamin Morton House (Knox County, Tennessee)
Bennington High School (Bennington County, Vermont)
Bennington Railroad Station (Bennington County, Vermont)
Benson Hotel (Multnomah County, Oregon)
Bently Hall (Crawford County, Pennsylvania)
Bergdoll Mansion (Philadelphia County, Pennsylvania)
Bernardsville Station (Somerset County, New Jersey)
Bernice P. Bishop Museum (Honolulu County, Hawaii)
Beth Jacob Social Hall and Congregation (Miami-Dade County, Florida)
Bethlehem Methodist Episcopal Church (Dorchester County, Maryland)
Bingham-Blossom House (Palm Beach County, Florida)
Binghamton City Hall (Broome County, New York)
Bishop Mackay-Smith House (Philadelphia County, Pennsylvania)
Bissel Street Water Tower (St. Louis, Missouri)
Block Island South East Light (Washington County, Rhode Island)
Bloom Township High School (Cook County, Illinois)
Bloomingdale School (Worcester County, Massachusetts)
Blue Earth County Courthouse (Blue Earth County, Minnesota)
Bodie Island Light Station (Dare County, North Carolina)
Borough House Plantation (Sumter County, South Carolina)
Boston Post Road Historic District (Westchester County, New York)
Bound Brook Station (Somerset County, New Jersey)
Bovey Village Hall (Itasca County, Minnesota)
Boxley Building (Roanoke, Virginia)
Boy's High School (Kings County, New York)
Bradshaw House (Jefferson County, Alabama)
Brave Boat Harbor Farm (York County, Maine)
Brelsford House (Palm Beach County, Florida)
Brenham High School (Washington County, Texas)
Bresee Hall (Otsego County, New York)
Bressmer-Baker House (Sangamon County, Illinois)
Brewster Memorial Hall (Carroll County, New Hampshire)
Bridgeport City Hall (Fairfield County, Connecticut)
Bridgeton School (Providence County, Rhode Island)
Bristol County Courthouse Complex (Bristol County, Massachusetts)
Broad Exchange Building (New York County, New York)
Broad Street National Bank (Mercer County, New Jersey)
Bronson Park Historic District (Kalamazoo County, Michigan)
Bronx County Courthouse (Bronx County, New York)
Brooks and Hewitt Halls (New York County, New York)
Broome County Courthouse (Broome County, New York)
Brown County Courthouse (Brown County, South Dakota)
Buck Memorial Library (Hancock County, Maine)
Buffalo Main LIght (Erie County, New York)
Bullock's Wilshire Building (Los Angeles County, California)
Burritt Hotel (Hartford County, Connecticut)
Bush--Holley House (Fairfield County, Connecticut)
Butler County National Bank (Butler County, Pennsylvania)
Cabell County Courthouse (Cabell County, West Virginia)
Cadillac Public Library (Wexford County, Michigan)
Calcasieu Parish Courthouse (Calcasieu Parish, Louisiana)
California Hall (Alameda County, California)
Calvin A. and Alta Koch Campbell House (Midland County, Michigan)
Calvinistic Congregational Church (Worcester County, Massachusetts)
Cambridge Home for the Aged and Infirm (Middlesex County, Massachusetts)
Cambridge Public Library (Middlesex County, Massachusetts)
Cannelton Cotton Mills (Perry County, Indiana)
Cape St. George Light (Franklin County, Florida)
Capital Club Building (Wake County, North Carolina)
Carbondale City Hall and Courthouse (Lackawanna County, Pennsylvania)
Carnegie Library (Essex County, New Jersey)
Carolands, The (San Mateo County, California)
Carroll County Court House (Carroll County, Missouri)
Casa Grande Stone Church (Pinal County, Arizona)
Cascade County Courthouse (Cascade County, Montana)
Castle Station (Saginaw County, Michigan)
Castle Tower Apartments (Cook County, Illinois)
Castner--Knott Building (Davidson County, Tennessee)
Cathedral of Saints Peter and Paul (Philadelphia County, Pennsylvania)
Cathedral of the Sacred Heart (Richmond, Virginia)
Center & Abernathy Store Building (Polk County, Tennessee)
Central Congregational Church (Middlesex County, Massachusetts)
Central High School (Pinellas County, Florida)
Central Park West Historic District (New York County, New York)
Central Railroad Station (Caddo Parish, Louisiana)
Central Square Historic District (Waltham) (Middlesex County, Massachusetts)
Central Synagogue (New York County, New York)
Central Technical High School (Onondaga County, New York)
Central Trust Company Building (Bexar County, Texas)
Centre County Courthouse (Centre County, Pennsylvania)
Chamber of Commerce (Hennepin County, Minnesota)
Chamber of Commerce Building (New York County, New York)
Chamber of Commerce Building (Hennepin County, Minnesota)
Chanute Field Historic District (Champaign County, Illinois)
Charles B. Lore Elementary School (New Castle County, Delaware)
Charles M. Pratt House (Ventura County, California)
Charles Sumner High School (St. Louis, Missouri)
Chase's Theater and Riggs Building (Washington, District of Columbia)
Chehalis Downtown Historic District (Lewis County, Washington)
Christ Church of LaCrosse (La Crosse County, Wisconsin)
Christ Episcopal Church (Middlesex County, New Jersey)
Christ Episcopal Church (Pierce County, Washington)
Christian Heurich Mansion (Washington, District of Columbia)
Christian Union Society Meetinghouse (Caledonia County, Vermont)
Church Green Buildings Historic District (Suffolk County, Massachusetts)
Church Missions House (New York County, New York)
Church of St. Agnes--Catholic (Ramsey County, Minnesota)
Church of St. Joseph--Catholic (Todd County, Minnesota)
Church of St. Stephen (Catholic) (Hennepin County, Minnesota)
Church of the Holy Innocents (Kings County, New York)
Church of the Resurrection (Queens County, New York)
Church of the Transfiguration (New York County, New York)
Church of the Transfiguration and Rectory (New York County, New York)
Citrus County Courthouse, Old (Citrus County, Florida)
City Hall (Clinton County, New York)
City Hall (Deer Lodge County, Montana)
City of Alliance Central Park Fountain (Box Butte County, Nebraska)
City Waterworks (Sarasota County, Florida)
Civic Center Historic District (Kenosha County, Wisconsin)
Civic Club (New York County, New York)
Claflin College Historic District (Orangeburg County, South Carolina)
Claflin School (Middlesex County, Massachusetts)
Claremont City Hall (Sullivan County, New Hampshire)
Clarence H. Cooke House (Honolulu County, Hawaii)
Clark--Robidoux House (Wallace County, Kansas)
Clifton Springs Sanitarium (Ontario County, New York)
Clinton County Courthouse (Clinton County, Iowa)
Coles County Courthouse (Coles County, Illinois)
Columbia Club (Marion County, Indiana)
10-story building with a flat roof with foot-thick brick curtain walls
Columbian Mutual Tower (Shelby County, Tennessee)
Columbus Gallery of Fine Arts (Franklin County, Ohio)
Conant Public Library (Cheshire County, New Hampshire)
Congregation Beth Israel Synagogue (Milwaukee County, Wisconsin)
Red brick and sandstone, former synagogue now a baptist church.
Congregational Church (Essex County, New Jersey)
Congress Street Fire Station (Suffolk County, Massachusetts)
Connecticut State Capitol (Hartford County, Connecticut)