Image credits

Where the pictures in El Trivia’s quizzes come from. All of them are in the public domain in the United States; nothing here is a license to reuse anything else on the site.

Presidents’ portraits

Used in US Presidents by Picture, cropped and resized only. Each is an official or historical portrait whose public-domain status rests on one of three grounds: a work of the US federal government, a work published before 1931, or a faithful photograph of a public-domain painting.

Portraits of the presidents, with author, date, basis and source
President	Author	Date	Public domain as	Source
George Washington	Gilbert Stuart	1803	reproduction of a public-domain painting	Source
John Adams	Gilbert Stuart	circa 1800	reproduction of a public-domain painting	Source
Thomas Jefferson	Rembrandt Peale	1800	reproduction of a public-domain painting	Source
James Madison	John Vanderlyn	1816	reproduction of a public-domain painting	Source
James Monroe	Samuel Finley Breese Morse	circa 1819	reproduction of a public-domain painting	Source
John Quincy Adams	Mathew Brady	circa 1843-1848	published before 1931	Source
Andrew Jackson	Ralph Eleaser Whiteside Earl	circa 1835	reproduction of a public-domain painting	Source
Martin Van Buren	Mathew Benjamin Brady	between circa 1855 and circa 1858	published before 1931	Source
William Henry Harrison	Albert Gallatin Hoit	1840	reproduction of a public-domain painting	Source
John Tyler	George Peter Alexander Healy	1842	reproduction of a public-domain painting	Source
James K. Polk	Mathew Brady	1849-02-14	published before 1931	Source
Zachary Taylor	Unknown (daguerreotype, Library of Congress)	between circa 1843 and circa 1845	published before 1931	Source
Millard Fillmore	Mathew Benjamin Brady	circa. 1855-1865	published before 1931	Source
Franklin Pierce	Mathew Brady (restored by Adam Cuerden)	between 1855 and 1865	published before 1931	Source
James Buchanan	From Brady daguerreotype (Mathew Brady) (1822-1896)	between 1850 and 1868	published before 1931	Source
Abraham Lincoln	Alexander Gardner	8 November 1863	published before 1931	Source
Andrew Johnson	Mathew Benjamin Brady	before 1875	published before 1931	Source
Ulysses S. Grant	Brady-Handy studio	between 1870 and 1880	published before 1931	Source
Rutherford B. Hayes	Mathew Benjamin Brady	between circa 1870 and circa 1880	published before 1931	Source
James A. Garfield	Brady-Handy studio	1881	published before 1931	Source
Chester A. Arthur	Abraham Bogardus (restored by Adam Cuerden)	1880s	published before 1931	Source
Grover Cleveland	Napoleon Sarony	1892-08-09	published before 1931	Source
Benjamin Harrison	Pach Brothers (restored by Adam Cuerden)	1896	published before 1931	Source
William McKinley	Unknown (Library of Congress)	circa 1900	published before 1931	Source
Theodore Roosevelt	Pach Brothers (restored by Adam Cuerden)	1904	published before 1931	Source
William Howard Taft	Pach Brothers (restored by Adam Cuerden)	1908	published before 1931	Source
Woodrow Wilson	Harris & Ewing, photographer	1914	published before 1931	Source
Warren G. Harding	Harris & Ewing, photographer	circa 1920	published before 1931	Source
Calvin Coolidge	Harris & Ewing	circa 1924	published before 1931	Source
Herbert Hoover	Underwood & Underwood	1928	published before 1931	Source
Franklin D. Roosevelt	Office of War Information (NARA 535943)	between 1942 and 1945	US federal work	Source
Harry S. Truman	Frank Gatteri, United States Army Signal Corps	circa 1945	US federal work	Source
Dwight D. Eisenhower	The White House	1959-05-29	US federal work	Source
John F. Kennedy	Cecil W. Stoughton	1963-07-11	US federal work	Source
Lyndon B. Johnson	Yoichi Okamoto	9 January 1969	US federal work	Source
Richard Nixon	White House photograph (NARA 530679)	1 June 1972	US federal work	Source
Gerald Ford	David Hume Kennerly	27 August 1974	US federal work	Source
Jimmy Carter	Department of Defense (NARA 558522)	1978	US federal work	Source
Ronald Reagan	Michael Evans	7 February 1981	US federal work	Source
George H. W. Bush	David Valdez	15 February 1989	US federal work	Source
Bill Clinton	Bob McNeely, The White House	1993-01-01	US federal work	Source
George W. Bush	Eric Draper	14 January 2003	US federal work	Source
Barack Obama	Pete Souza, The White House	6 December 2012	US federal work	Source
Donald Trump	Daniel Torok	2025-06-02	US federal work	Source
Joe Biden	Adam Schultz	2021-03-03	US federal work	Source

Flags

Used in Flags of the World: the country-flags collection, drawn from Wikimedia Commons, which treats national flags as public domain; Kyrgyzstan’s from Wikimedia Commons.

Maps

The world map is drawn from Natural Earth and the US map from the US Census Bureau’s cartographic boundary files, both in the public domain.

Photos

The photographs on the posters are from Unsplash, credited at the foot of every page.

Image credits

Presidents’ portraits

Flags

Maps

Photos

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