Question: What group of people built and settled the current National Historic Landmarks in Iowa , that 's in Iowa County ?

text: List of National Historic Landmarks in Iowa
Current NHLs
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The List of National Historic Landmarks in Iowa contains the landmarks designated by the U.S. Federal Government for the U.S. state of Iowa. There are 26 National Historic Landmarks (NHLs) in Iowa.
Landmark name Date designated Location County Description
1 Amana Colonies June 23 , 1965 ( # 66000336 ) Middle Amana 41°47′59″N 91°55′15″W / 41.799722°N 91.920833°W / 41.799722 ; -91.920833 ( Amana Colonies ) Iowa Amana Villages community , historic and modern
2 Blood Run Site May 22 , 1970 ( # 70000246 ) Granite , IA and Shindler , SD 43°28′N 96°35′W / 43.47°N 96.58°W / 43.47 ; -96.58 ( Blood Run Site ) Lyon , IA and Lincoln , SD An archaeological site , overlapping into South Dakota
3 Davis Oriole Earthlodge Site October 16 , 2012 ( # 12001018 ) Glenwood 41°04′16″N 95°47′12″W / 41.071111°N 95.786667°W / 41.071111 ; -95.786667 ( Davis Oriole Earthlodge Site ) Mills A well-preserved Plains Indian lodge archaeological site ; located in Pony Creek Park
4 Grenville M. Dodge House November 5 , 1961 ( # 66000338 ) Council Bluffs 41°15′18″N 95°50′53″W / 41.25513°N 95.84813°W / 41.25513 ; -95.84813 ( Grenville M. Dodge House ) Pottawattamie
5 Dubuque County Jail May 28 , 1987 ( # 72000473 ) Dubuque 42°30′06″N 90°39′53″W / 42.50154°N 90.66470°W / 42.50154 ; -90.66470 ( Dubuque County Jail ) Dubuque
6 The Farm House July 19 , 1964 ( # 66000339 ) Ames 42°01′41″N 93°38′32″W / 42.02807°N 93.64222°W / 42.02807 ; -93.64222 ( The Farm House ) Story Home of agriculturist and teacher Seagram A. Knapp and of U.S. Secretary of Agriculture James Wilson , now on Iowa State University campus
7 Fort Des Moines Provisional Army Officer Training School May 30 , 1974 ( # 74000805 ) Des Moines 41°31′36″N 93°36′55″W / 41.526606°N 93.615233°W / 41.526606 ; -93.615233 ( Fort Des Moines Provisional Army Officer Training School ) 41°31′36″N 93°36′55″W / 41.526606°N 93.615233°W / 41.526606 ; -93.615233 ( Fort Des Moines Provisional Army Officer Training School ) Polk Training site for black officers in World War I
8 George M. Verity ( towboat ) December 20 , 1989 ( # 89002459 ) Keokuk 40°23′29″N 91°22′21″W / 40.39129°N 91.37250°W / 40.39129 ; -91.37250 ( George M. Verity ( towboat ) ) Lee One of three surviving steam-powered towboats in the United States , this ship pioneered on upper Mississippi in a certain way , leading to large private industry
9 William P. Hepburn House December 8 , 1976 ( # 73000736 ) Clarinda 40°44′30″N 95°02′31″W / 40.741667°N 95.041806°W / 40.741667 ; -95.041806 ( William P. Hepburn House ) Page
10 Reverend George B. Hitchcock House February 17 , 2006 ( # 77000500 ) Lewis 41°18′12″N 95°06′12″W / 41.30325°N 95.103472°W / 41.30325 ; -95.103472 ( Reverend George B. Hitchcock House ) Cass
11 Herbert Hoover Birthplace June 23 , 1965 ( # 66000110 ) West Branch 41°40′07″N 91°20′53″W / 41.668611°N 91.348056°W / 41.668611 ; -91.348056 ( Herbert Hoover Birthplace ) Cedar Two-room cottage birthplace of Herbert Hoover , 31st U.S. President
12 Indian Village Site ( Witrock Area ) July 19 , 1964 ( # 66000888 ) Sutherland 42°58′50″N 95°25′22″W / 42.98055556°N 95.42277778°W / 42.98055556 ; -95.42277778 ( Indian Village Site ( Witrock Area ) ) O'Brien An archaeological site
13 Kimball Village Site December 23 , 2016 ( # 100000835 ) Westfield Plymouth Late Prehistoric Plains Village site
14 Lone Star ( towboat ) December 20 , 1989 ( # 89002461 ) LeClaire 41°35′54″N 90°20′33″W / 41.598303°N 90.342553°W / 41.598303 ; -90.342553 ( Lone Star ( towboat ) ) Scott A towboat
15 Merchants ' National Bank January 7 , 1976 ( # 76000804 ) Grinnell 41°44′32″N 92°43′33″W / 41.74229°N 92.72580°W / 41.74229 ; -92.72580 ( Merchants ' National Bank ) Poweshiek Louis Sullivan -designed bank building on a corner in Grinnell
16 Julien Dubuque 's Mines November 4 , 1993 ( # 88002662 ) Dubuque 42°28′07″N 90°38′47″W / 42.468739°N 90.646311°W / 42.468739 ; -90.646311 ( Julien Dubuque 's Mines ) Dubuque Historic district including Julien Dubuque Monument and archaeological sites relating to early lead mining in area
17 Old Capitol January 7 , 1976 ( # 72000475 ) Iowa City 41°39′34″N 91°32′08″W / 41.65943°N 91.53565°W / 41.65943 ; -91.53565 ( Old Capitol ) Johnson It is one of the five-building Pentacrest , another NRHP
18 Phipps Site July 19 , 1964 ( # 66000335 ) Cherokee Cherokee An archaeological site
19 Sergeant Floyd ( towboat ) May 5 , 1989 ( # 89001079 ) Sioux City 42°29′28″N 96°25′07″W / 42.491175°N 96.418581°W / 42.491175 ; -96.418581 ( Sergeant Floyd ( towboat ) ) Woodbury Another of just 3 steam-powered towboats surviving
20 Sergeant Floyd Monument June 30 , 1960 ( # 66000340 ) Sioux City 42°27′38″N 96°22′39″W / 42.46068°N 96.37753°W / 42.46068 ; -96.37753 ( Sergeant Floyd Monument ) Woodbury Monument to the only member of the 1805 Lewis and Clark expedition who died during the trip . First declared U.S. National Historic Landmark