Matches in DBpedia 2014 for { ?s ?p 1800. }
- Central_Norristown_Historic_District built "1800".
- Centre_Harbor_Village_Historic_District built "1800".
- Chestnut_Ridge_(Aberdeen,_Maryland) built "1800".
- Christopher_Carpenter_House built "1800".
- Christopher_Rhodes_House built "1800".
- Clarksburg_Downtown_Historic_District built "1800".
- Clelland_House built "1800".
- Col._Sidney_Berry_House built "1800".
- Columbia_Turnpike-West_Tollhouse built "1800".
- Common_Historic_District_(Reading,_Massachusetts) built "1800".
- Corner_in_Celebrities_Historic_District built "1800".
- Dana_Meeting_House built "1800".
- Danville_West_Market_Street_Historic_District built "1800".
- David_Mathews_House built "1800".
- De_Witt_Park_Historic_District built "1800".
- Dexter_Richardson_House built "1800".
- Downtown,_Providence,_Rhode_Island built "1800".
- Downtown_Providence_Historic_District built "1800".
- Dr._Amos_Holbrook_House built "1800".
- Dr._Chester_Hunt_Office built "1800".
- Dumbarton_House built "1800".
- Dutch_Reformed_Church_(Harrodsburg,_Kentucky) built "1800".
- East_New_Market_Historic_District built "1800".
- Eatons_Corners_Historic_District built "1800".
- Ebenezer_Lutheran_Chapel built "1800".
- Eighteen_Mile_House built "1800".
- Eliphas_Buffett_House built "1800".
- Blanding_Farm built "1800".
- Ephraim_Weston_House built "1800".
- Ezra_Carpenter_House built "1800".
- Fenner–Snyder_Mill built "1800".
- Frederick_Historic_District built "1800".
- Fremont_Meeting_House built "1800".
- Fuller_House_(Barnstable,_Massachusetts) built "1800".
- Furnace_Hill_Brook_Historic_and_Archeological_District built "1800".
- Godlington_Manor built "1800".
- Goff_Farm built "1800".
- Green_Hill_Farm built "1800".
- Hacienda_Santa_Rita built "1800".
- Harpers_Ferry_Historic_District built "1800".
- Haverhill_Street_Milestone built "1800".
- Henry_Tunis_Smith_Farm built "1800".
- Hezekiah_Palmer_House built "1800".
- Home_of_Franklin_D._Roosevelt_National_Historic_Site built "1800".
- House_at_173-175_Ward_Street built "1800".
- Hulet_Clark_Farmstead built "1800".
- Jacob_Hoornbeck_Stone_House built "1800".
- James_Butler_House built "1800".
- James_Thome_Farm built "1800".
- Jena_(Oxford,_Maryland) built "1800".
- Jethro_Wood_House built "1800".
- John's_Burnt_Mill_Bridge built "1800".
- John_Carner_Jr._House built "1800".
- John_Embert_Farm built "1800".
- John_Evans_House_(Newark,_Delaware) built "1800".
- John_H._Traver_Farm built "1800".
- John_Harbach_House built "1800".
- John_R._Waterman_House built "1800".
- John_Robbins_House_(Acton,_Massachusetts) built "1800".
- Jonathan_Sprague_House built "1800".
- Joseph_Chandler_House built "1800".
- Kanawha_Hotel built "1800".
- Kent_Plantation_House built "1800".
- Lantz-Zeigler_House built "1800".
- Lee-Longsworth_House built "1800".
- Leech-Lloyd_Farmhouse_and_Barn_Complex built "1800".
- Leech-Parker_Farmhouse built "1800".
- Lot_Crocker_House built "1800".
- Mansfield_Hollow_Historic_District built "1800".
- Marion_Historic_District_(Marion,_South_Carolina) built "1800".
- McClung's_Price_Place built "1800".
- McCoy-Shoemaker_Farm built "1800".
- McLellan-Sweat_Mansion built "1800".
- Meadow_Farm built "1800".
- Meadville_Downtown_Historic_District built "1800".
- Meeting-of-the-Waters built "1800".
- Montgomery_Saltbox_Houses built "1800".
- Mt._Pleasant_Iron_Works_House built "1800".
- Mynderse-Frederick_House built "1800".
- Nallin_Farm_Springhouse_and_Bank_Barn built "1800".
- Nelson_County_Jail built "1800".
- North_Main_Street_Historic_District_(Canandaigua,_New_York) built "1800".
- Old_Homer_Village_Historic_District built "1800".
- Peachcroft built "1800".
- Pejačević_Castle_in_Virovitica built "1800".
- Piatt's_Landing,_Kentucky built "1800".
- Piney_Grove_at_Southall's_Plantation built "1800".
- Poppletown_Farmhouse built "1800".
- Portsmouth_Naval_Shipyard built "1800".
- Prospect_Hall_(Frederick,_Maryland) built "1800".
- Ravenshurst built "1800".
- Red_River_Meeting_House built "1800".
- Reef_Bay_Sugar_Factory_Historic_District built "1800".
- Roberts_House_(Canonsburg,_Pennsylvania) built "1800".
- Rockdale_Common_Housing_District built "1800".
- Rose_Hill_(Guilderland,_New_York) built "1800".
- Saint_James_District built "1800".
- Samuel_Viall_House built "1800".
- Sanford-Curtis-Thurber_House built "1800".
- Schoolridge_Farm built "1800".