Built during 1920s

"Old Mill" in Osage City, MO (Cole County, Missouri)
Leans due to overfill and settlement.
12 Mile road-- Kalamazoo River Bridge (Calhoun County, Michigan)
Concrete arch bridge over Kalamazoo River on 12 Mile Road
1501 Broadway (New York County, New York)
1524 Grand Avenue Building (Jackson County, Missouri)
1616 Building (Philadelphia County, Pennsylvania)
1900 Rittenhouse Square Apartments (Philadelphia County, Pennsylvania)
1926 Republic National Bank (Dallas County, Texas)
1927 Lake Lure Inn and Spa (Rutherford County, North Carolina)
Historic Hotel in Lake Lure, NC
20th Century Club (Washoe County, Nevada)
23 Mile Road--Kalamazoo River Bridge (Calhoun County, Michigan)
310 West Church Street Apartments (Duval County, Florida)
35 East Wacker (Cook County, Illinois)
40-story 523-foot skyscraper.
4928 Bryan Street Apartments (Dallas County, Texas)
4K Ranch (Stillwater County, Montana)
5th Avenue Theater (King County, Washington)
61 16th Street Apartment Building (Fulton County, Georgia)
69th St. Theater (Delaware County, Pennsylvania)
705 Piedmont Avenue Apartments (Fulton County, Georgia)
A. B. Brewer Building (Stone County, Arkansas)
A. C. Steere Elementary School (Caddo Parish, Louisiana)
A. E. Taplin Apartment Building (Guilford County, North Carolina)
A. Einar Johnson House (Codington County, South Dakota)
A. Fletcher Spigner House (Richland County, South Carolina)
A. G. Becker Property (Lake County, Illinois)
A. H. Buchan Company Building (Marion County, South Carolina)
A. J. Andrus Duplex (Cerro Gordo County, Iowa)
A. J. Williamson House (Hawaii County, Hawaii)
A. M. Scott House (Collin County, Texas)
A. T. Jones House (Taylor County, Texas)
A. W. Hayden House (Bernalillo County, New Mexico)
A.O. Smith Co. Automated Frame Assembly Line (Milwaukee County, Wisconsin)
A large campus of manufacturing, including automobile frames, farm equipement and numerous other products.
Aaron Barber Memorial Building (Livingston County, New York)
Aaron Drumright House (Creek County, Oklahoma)
Abilene Fire Station No. 2 (Taylor County, Texas)
Abou Ben Adhem Shrine Mosque (Greene County, Missouri)
Abraham Lincoln High School (Polk County, Iowa)
Abramson House (Monroe County, Arkansas)
Academy of Richmond County--1926 Campus (Richmond County, Georgia)
Ace Art Company (Middlesex County, Massachusetts)
Acme Brass and Machine Works Building (Jackson County, Missouri)
Acme Theater (Fremont County, Wyoming)
Actors Temple (New York County, New York)
Ada Theater (Ada County, Idaho)
Adah Robinson House (Tulsa County, Oklahoma)
Adair County Courthouse (Adair County, Oklahoma)
Adair Viaduct (Adair County, Iowa)
Adams Cotton Gin Building (Muscogee County, Georgia)
Adams County Courthouse (Adams County, North Dakota)
Adams Gristmill Warehouse (Windham County, Vermont)
Adams House (Carson City, Nevada)
Adams Woodframe Grain Elevator (Texas County, Oklahoma)
Adamson House (Los Angeles County, California)
Adath Israel Temple (Bolivar County, Mississippi)
Addison Apartments (Mecklenburg County, North Carolina)
Addison W. Lee House (Jefferson County, Kentucky)
Adeline Apartment Building (Sedgwick County, Kansas)
Adelphi Theater (Philadelphia County, Pennsylvania)
Adler Planetarium (Cook County, Illinois)
Administration Building (Union County, Oregon)
Administration Buildings (Palm Beach County, Florida)
Admiral Theater (Cook County, Illinois)
ADVENTURE (schooner) (Essex County, Massachusetts)
Afro-American Sons and Daughters Hospital (Yazoo County, Mississippi)
Agecroft (Richmond, Virginia)
Agnes Vaille Shelter (Larimer County, Colorado)
Agnew Hunter Bahnson House (Forsyth County, North Carolina)
Agricultural Experiment Station Barn (Kodiak Island Borough, Alaska)
Agriculture Building (Wake County, North Carolina)
Ahavas Sholem Synagogue (New Haven County, Connecticut)
Ahavas Sholom (Essex County, New Jersey)
Ahoskie School (Hertford County, North Carolina)
Ahwahnee Hotel (Mariposa County, California)
Akron Jewish Center (Summit County, Ohio)
Former Jewish Community Center, now owned by the City of Akron
Al Malaikah Temple (Los Angeles County, California)
Alabama Theatre (Jefferson County, Alabama)
A movie palace, built in 1927, by the Paramount Pictures.
Aladdin Theater (Brevard County, Florida)
Alamance County Courthouse, (Alamance County, North Carolina)
Alamance Hotel (Alamance County, North Carolina)
Alameda (Marion County, Indiana)
Alameda High School (Alameda County, California)
Alameda Veterans' Memorial Building (Alameda County, California)
Alamo National Bank Building (Bexar County, Texas)
Alamo Placita Park (Denver County, Colorado)
Alamo Theater (Coweta County, Georgia)
Alana Apartment Hotel (Jackson County, Missouri)
Alango School (St. Louis County, Minnesota)
Alapaha Colored School (Berrien County, Georgia)
Alaska Airlines Field at Husky Stadium (King County, Washington)
Alaska Nellie's Homestead (Kenai Peninsula Borough, Alaska)
Alban Towers Apartment Building (Washington, District of Columbia)
Albany Housefurnishing Company (Dougherty County, Georgia)
Albany Municipal Airport (Linn County, Oregon)
Albany Theatre (Dougherty County, Georgia)
Albert and Liberal Arts Halls (Randolph County, West Virginia)
Albert B. and Mary Cornell House (Josephine County, Oregon)
Albert Pike Hotel (Pulaski County, Arkansas)
Albert Pike Memorial Temple (Pulaski County, Arkansas)
Albert S. and Ruth Goodloe House (Taylor County, Texas)
Albert S. Heck Mansion (Roane County, West Virginia)
Albert Schmidt House and Studio (Santa Fe County, New Mexico)
Albert Spencer Wilcox Building (Kauai County, Hawaii)
Albert W. Henn Mansion (Cuyahoga County, Ohio)
Albert Whisinant House (White County, Arkansas)
Albert Zahn House (Door County, Wisconsin)
Albertina Kerr Nursery (Multnomah County, Oregon)
Alcazar Hotel (Cuyahoga County, Ohio)
Alden Park Manor (Philadelphia County, Pennsylvania)
Alden Park Towers (Wayne County, Michigan)
Alderman House (Lee County, Florida)
Alderson--Coston House (Hot Spring County, Arkansas)
Aldridge Hotel (Pottawatomie County, Oklahoma)
Alex Loeb Building (Lauderdale County, Mississippi)
Alexander and Baldwin Building (Honolulu County, Hawaii)
Alexander and Cornelia Lewthwaite House (Multnomah County, Oregon)
ALEXANDER HAMILTON (steamship) (Monmouth County, New Jersey)
Alexander Pantages Theater (Fresno County, California)
Alexander Theatre (Los Angeles County, California)
Alexander-Acacia Bridge (Marin County, California)
Alexanders (Ada County, Idaho)
Alexandria Hall--Louisiana College (Rapides Parish, Louisiana)
Alexandria Theater (San Francisco County, California)
Alfalfa County Courthouse (Alfalfa County, Oklahoma)
Alfred C. and Nettie Ruby House (Multnomah County, Oregon)
Alfred C. Clas House (Milwaukee County, Wisconsin)
Alfred Clas' retirement home, built with style and whimsey
Alfred Friar House (DeWitt County, Texas)
Alfred H. Renshaw House (Albany County, New York)
Alfred J. Comeau House (Palm Beach County, Florida)
Alfred M. Hoelz House (Milwaukee County, Wisconsin)
Historically significant Ernest Flagg designed stone masonry house
Alfred W. Henson House (White County, Arkansas)
Algonquin Apartments (Miami-Dade County, Florida)
Alhambra Apartments (Woodbury County, Iowa)
Alhambra Theater (San Francisco County, California)
Alhambra Theatre (Christian County, Kentucky)
Alice H. Robbins House (Travis County, Texas)
Aline Barnsdall Complex (Los Angeles County, California)
All American Bank Building (St. Joseph County, Indiana)
All Saints Roman Catholic Church (Harris County, Texas)
Allegheny River Lock and Dam No. 4 (Allegheny County, Pennsylvania)
Allegheny River Lock and Dam No. 6 (Armstrong County, Pennsylvania)
Allegheny River Lock and Dam No. 7 (Armstrong County, Pennsylvania)
Allegheny River Lock and Dam No.8 (Armstrong County, Pennsylvania)
Allegheny River Locka and Dam No. 5 (Armstrong County, Pennsylvania)
Allen Academy Memorial Hall (Brazos County, Texas)
Allen Memorial Medical Library (Cuyahoga County, Ohio)
Allen Tire Company and Gas Station (Nevada County, Arkansas)
Allendale County Courthouse (Allendale County, South Carolina)
County Courthouse in Allendale, SC
Allentown Bridge (Apache County, Arizona)
Abandoned pratt deck truss bridge over Puerco River on Former alignement of Allentown Road (Old US 66)
Allentown Masonic Temple (Lehigh County, Pennsylvania)
Allied Arts Building (Lynchburg, Virginia)
Allison Woods (Iredell County, North Carolina)
Aloha Tower (Honolulu County, Hawaii)
Alonzo Ward Hotel (Brown County, South Dakota)
Alpha Delta Phi Fraternity House (Champaign County, Illinois)
Alpha Delta Pi Sorority House (Champaign County, Illinois)
Alpha Phi Sorority House (Lane County, Oregon)
Alpha Rho Chi Fraternity House (Champaign County, Illinois)
Alpha Tau Omega Fraternity House (Washoe County, Nevada)
Alpha Tau Omega Fraternity House (Tippecanoe County, Indiana)
Alpine County Courthouse (Alpine County, California)
Alpine Institute (Overton County, Tennessee)
Alumni Gym (Blount County, Tennessee)
Alva Theater (Burke County, North Carolina)
Alvin Cullom York Farm (Fentress County, Tennessee)
Amarillo Globe Dream House (Randall County, Texas)
Amarillo Helium Plant (Potter County, Texas)
Ambassador Apartments (Greene County, Missouri)
Ambassador Apartments (Multnomah County, Oregon)
Ambassador Bridge (Wayne County, Michigan)
Ambassador Hotel (Tulsa County, Oklahoma)
Ambassador Hotel (Milwaukee County, Wisconsin)
Art Deco luxury hotel with Egyptian Revival styling details
Ambassador Hotel Historic District (Jackson County, Missouri)
Ambassador Theater Building (St. Louis, Missouri)
Ambler Theater (Montgomery County, Pennsylvania)
Amelia County Courthouse (Amelia County, Virginia)
American Can Company Complex (Multnomah County, Oregon)
American Insurance Union Citadel (Franklin County, Ohio)
American Legion Cabin (Latah County, Idaho)
American Legion Hall (Lincoln County, Idaho)
American Legion Hall (Thurston County, Washington)
American National Bank (Camden County, New Jersey)
American National Bank Building (Palm Beach County, Florida)
American National Bank Building (Sarasota County, Florida)
American Radiator Building (New York County, New York)
American Railway Express Company Garage (Philadelphia County, Pennsylvania)
American State Bank (Cook County, Illinois)
American Stock Exchange (New York County, New York)
American Telephone and Telegraph Company Building (Bamberg County, South Carolina)
Historic building in Bamberg, SC