Matches in DBpedia 2014 for { ?s ?p 1840. }
- Cotton_Press_(Tarboro,_North_Carolina) built "1840".
- Court_Street_Historic_District_(Binghamton,_New_York) built "1840".
- Court_Street_Historic_District_(Plattsburgh,_New_York) built "1840".
- Courthouse_and_Lawyers'_Row built "1840".
- Curtis_House_(Demopolis,_Alabama) built "1840".
- Daisy_Flour_Mill built "1840".
- Dauphine_Hotel built "1840".
- David_G._Raney_House built "1840".
- David_Hagaman_House built "1840".
- David_Sprague_House built "1840".
- Dole_House_(Lockport,_New_York) built "1840".
- Dowden_Tannery built "1840".
- Downtown_Commercial_District_(Bowling_Green,_Kentucky) built "1840".
- Downtown_Ossining_Historic_District built "1840".
- Dutch_Reformed_Church_of_Gansevoort built "1840".
- East_End_Historic_District_(Galveston,_Texas) built "1840".
- Elias_Titus_House built "1840".
- Ella_Mahalla_Cutter_Sterling_House built "1840".
- Elm_Grange built "1840".
- Erskine_College-Due_West_Historic_District built "1840".
- Ezekiel_Sawin_House built "1840".
- Ezra_T._Phelps_Farm_Complex built "1840".
- First_Congregational_Church_(Stoneham,_Massachusetts) built "1840".
- First_Parish_Church_(Duxbury,_Massachusetts) built "1840".
- Fort_Durham built "1840".
- Fort_Greene_Historic_District built "1840".
- Foscue-Whitfield_House built "1840".
- Free_Will_Baptist_Church_and_Cemetery built "1840".
- George_Neale,_Jr.,_House built "1840".
- Georgia_Cottage built "1840".
- Gillespie_House_(Guilderland,_New_York) built "1840".
- Griffith_Breese_Farm built "1840".
- Hagerstown_Charity_School built "1840".
- Hamilton_Millwright-Agent's_House built "1840".
- Hampstead_(Jerusalem,_New_York) built "1840".
- Harlem_Plantation_House built "1840".
- Harnden_Farm built "1840".
- Harrison_Grist_Mill built "1840".
- Harry_Fischel_House built "1840".
- Hawley-Green_Historic_District built "1840".
- Henry_A._and_Evanlina_Dubois_House built "1840".
- Henry_McCauley_Farm built "1840".
- Hessinger_Store built "1840".
- Hibernian_Hall_(Charleston,_South_Carolina) built "1840".
- Highlands_Historic_District_(Fall_River,_Massachusetts) built "1840".
- Home_Farm_(East_Whitehall,_New_York) built "1840".
- House_at_136_Hampstead_Street built "1840".
- House_at_15-19_Park_Street built "1840".
- House_at_193_Vernon_Street built "1840".
- House_at_23_East_Street built "1840".
- House_at_269_Green_Street built "1840".
- House_at_28_Cordis_Street built "1840".
- House_at_313_North_Main_Street built "1840".
- House_at_526_Prospect_Street built "1840".
- House_at_73_Grove_Street built "1840".
- Hutchinson-Blood_House built "1840".
- Israel_Stowell_Temperance_House built "1840".
- Ithaca_Pottery_Site built "1840".
- J._Dupuy_Stone_House built "1840".
- Jacks-Manning_Farm built "1840".
- Jacob_Stanton_House built "1840".
- John_Bell_Farm built "1840".
- John_Herrington_House_and_Herrington_Bethel_Church built "1840".
- John_Noyes_House built "1840".
- John_Rankin_House_(Brooklyn) built "1840".
- John_Richardson_House_(Lancaster,_New_York) built "1840".
- John_Settle_Farm built "1840".
- John_William_Draper_House built "1840".
- Johnson_House_(Cape_Vincent,_New_York) built "1840".
- Jonathan_Sturges_House built "1840".
- Joseph_Perkins_House built "1840".
- Judge_John_Ryon_House built "1840".
- Kingsbury-Whitaker_House built "1840".
- Knipe-Johnson_Farm built "1840".
- Kreidersville_Covered_Bridge built "1840".
- La_Casa_Alvarado built "1840".
- Lakewood_(Livingston,_Alabama) built "1840".
- Leesport_Lock_House built "1840".
- Lefferts-Laidlaw_House built "1840".
- Leinkauf_Historic_District built "1840".
- Levi_Ball_House built "1840".
- Lewis_Jones_House_(Centerville,_Indiana) built "1840".
- Linchester_Mill built "1840".
- Lorillard_Snuff_Mill built "1840".
- Los_Alamos_Ranch_House built "1840".
- Luther_Brooks_House built "1840".
- Lyman_P._Akins_House built "1840".
- Magnolia_Grove_(Greensboro,_Alabama) built "1840".
- Magnolia_Plantation_(Derry,_Louisiana) built "1840".
- Main_Street-Albertson_Street-Park_Place_Historic_District built "1840".
- Maple_Lawn_Farm built "1840".
- Martin_Dunsbach_House built "1840".
- Matthew_McCrea_House built "1840".
- Mauna_Loa built "1840".
- McClelland_Homestead built "1840".
- McClure-Shelby_House built "1840".
- McFarlane-Bredt_House built "1840".
- Methodist_Episcopal_Church_of_West_Martinsburg built "1840".
- Middlefield-Becket_Stone_Arch_Railroad_Bridge_District built "1840".
- Mill_Creek_Friends_Meetinghouse built "1840".